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Aravinth Manivannan 2023-10-30 18:08:03 +05:30
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404.html
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<!doctype html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-regular.woff2" type="font/woff2" crossorigin>
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-700.woff2" type="font/woff2" crossorigin>
<link rel="stylesheet" href="/main.b63ce50dfa61fad6110b3083ff8c73329c5faa56efa9fce74542ba32665b6f205859f41203427020164409ce1a5ad12d0114f490f7a4b511dc1f99b633255661.css" integrity="sha512-tjzlDfph&#43;tYRCzCD/4xzMpxfqlbvqfznRUK6MmZbbyBYWfQSA0JwIBZECc4aWtEtART0kPektRHcH5m2MyVWYQ==" crossorigin="anonymous">
<noscript><style>img.lazyload { display: none; }</style></noscript>
<meta name="robots" content="noindex, follow">
<title>404 Page not found - mCaptcha</title>
<meta name="description" content="mCaptcha - PoW based DoS protection">
<link rel="canonical" href="/404.html">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:image" content="/icon.png">
<meta name="twitter:title" content="404 Page not found">
<meta name="twitter:description" content="mCaptcha - PoW based DoS protection">
<meta name="twitter:site" content="@">
<meta name="twitter:creator" content="@">
<meta property="og:title" content="404 Page not found">
<meta property="og:description" content="mCaptcha - PoW based DoS protection">
<meta property="og:type" content="website">
<meta property="og:url" content="/404.html">
<meta property="og:image" content="/icon.png"/>
<meta property="og:site_name" content="mCaptcha">
<meta property="article:publisher" content="https://www.facebook.com/">
<meta property="article:author" content="https://www.facebook.com/">
<meta property="og:locale" content="en_US">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "BreadcrumbList",
"itemListElement": [{
"@type": "ListItem",
"position": 1 ,
"name": "Home",
"item": "\/"
},{
"@type": "ListItem",
"position": 2 ,
"name": "404.html",
"item": "\/404.html\/"
}]
}
</script>
<meta name="theme-color" content="#fff">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="manifest" href="/site.webmanifest">
</head>
<body class="error404">
<div class="header-bar fixed-top"></div>
<header class="navbar fixed-top navbar-expand-md navbar-light">
<div class="container">
<input class="menu-btn order-0" type="checkbox" id="menu-btn">
<label class="menu-icon d-md-none" for="menu-btn"><span class="navicon"></span></label>
<a class="navbar-brand order-1 order-md-0 me-auto" href="/">mCaptcha</a>
<button id="mode" class="btn btn-link order-2 order-md-4" type="button" aria-label="Toggle mode">
<span class="toggle-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"></path></svg></span>
<span class="toggle-light"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"></circle><line x1="12" y1="1" x2="12" y2="3"></line><line x1="12" y1="21" x2="12" y2="23"></line><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line><line x1="1" y1="12" x2="3" y2="12"></line><line x1="21" y1="12" x2="23" y2="12"></line><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line></svg></span>
</button>
<ul class="navbar-nav social-nav order-3 order-md-5">
<li class="nav-item">
<a class="nav-link" href="https://github.com/mCaptcha"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"></path></svg><span class="ms-2 visually-hidden">GitHub</span></a>
</li>
</ul>
<div class="collapse navbar-collapse order-4 order-md-1">
<ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class="nav-item">
<a class="nav-link" href="/blog/">Blog</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/community/">Community</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/contact/">Contact</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/about/">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/docs/webmasters/installing-captcha/">Docs</a>
</li>
</ul>
<div class="break order-6 d-md-none"></div>
<form class="navbar-form flex-grow-1 order-7 order-md-3">
<input id="userinput" class="form-control is-search" type="search" placeholder="Search docs..." aria-label="Search docs..." autocomplete="off">
<div id="suggestions" class="shadow bg-white rounded"></div>
</form>
</div>
</div>
</header>
<div class="wrap container" role="document">
<div class="content">
<div class="row justify-content-center">
<div class="col-md-12 col-lg-10 col-xl-8">
<article>
<h1 class="text-center">Page not found :(</h1>
<p class="text-center">The page you are looking for doesn't exist or has been moved.</p>
</article>
</div>
</div>
</div>
</div>
<footer class="footer text-muted">
<div class="container">
<div class="row">
<div class="col-lg-8 order-last order-lg-first">
<ul class="list-inline">
<li class="list-inline-item">Powered by <a href="https://gohugo.io/">Hugo</a>, and <a href="https://getdoks.org/">Doks</a></li>
</ul>
</div>
<div class="col-lg-8 order-first order-lg-last text-lg-end">
<ul class="list-inline">
<li class="list-inline-item"><a href="/about/">About</a></li>
<li class="list-inline-item"><a href="/donate">Donate</a></li>
<li class="list-inline-item"><a href="/privacy-policy/">Privacy</a></li>
<li class="list-inline-item"><a href="/security">Security</a></li>
<li class="list-inline-item"><a href="https://stats.uptimerobot.com/GK7VLFJnBl">Status</a></li>
<li class="list-inline-item"><a href="/thanks">Thanks</a></li>
</ul>
</div>
</div>
</div>
</footer>
<script src="/main.min.bc2465e4e1abda257c622bf89b85235da437778b3e3f80e01762312382cc27d4e50a8a4de22e464dc82e3a61039da8aef9d6d5e62b76711fa93d9663860b1926.js" integrity="sha512-vCRl5OGr2iV8Yiv4m4UjXaQ3d4s&#43;P4DgF2IxI4LMJ9TlCopN4i5GTcguOmEDnaiu&#43;dbV5it2cR&#43;pPZZjhgsZJg==" crossorigin="anonymous" defer></script>
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</body>
</html>
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="noindex, follow"><title>404 Page not found - mCaptcha</title><meta name=description content="mCaptcha - PoW based DoS protection"><link rel=canonical href=/404.html><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/icon.png"><meta name=twitter:title content="404 Page not found"><meta name=twitter:description content="mCaptcha - PoW based DoS protection"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="404 Page not found"><meta property="og:description" content="mCaptcha - PoW based DoS protection"><meta property="og:type" content="website"><meta property="og:url" content="/404.html"><meta property="og:image" content="/icon.png"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"404.Html","item":"\/404.html\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class=error404><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
<label class="menu-icon d-md-none" for=menu-btn><span class=navicon></span></label><a class="navbar-brand order-1 order-md-0 me-auto" href=/>mCaptcha</a>
<button id=mode class="btn btn-link order-2 order-md-4" type=button aria-label="Toggle mode">
<span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class=nav-item><a class=nav-link href=/docs/webmasters/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><div class="row justify-content-center"><div class="col-md-12 col-lg-10 col-xl-8"><article><h1 class=text-center>Page not found :(</h1><p class=text-center>The page you are looking for doesn't exist or has been moved.</p></article></div></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

191
about/index.html
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@ -1,190 +1,17 @@
<!doctype html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-regular.woff2" type="font/woff2" crossorigin>
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-700.woff2" type="font/woff2" crossorigin>
<link rel="stylesheet" href="/main.b63ce50dfa61fad6110b3083ff8c73329c5faa56efa9fce74542ba32665b6f205859f41203427020164409ce1a5ad12d0114f490f7a4b511dc1f99b633255661.css" integrity="sha512-tjzlDfph&#43;tYRCzCD/4xzMpxfqlbvqfznRUK6MmZbbyBYWfQSA0JwIBZECc4aWtEtART0kPektRHcH5m2MyVWYQ==" crossorigin="anonymous">
<noscript><style>img.lazyload { display: none; }</style></noscript>
<meta name="robots" content="index, follow">
<meta name="googlebot" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1">
<meta name="bingbot" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1">
<title>About - mCaptcha</title>
<meta name="description" content="About mCaptcha">
<link rel="canonical" href="/about/">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:image" content="/icon.png">
<meta name="twitter:title" content="About">
<meta name="twitter:description" content="About mCaptcha">
<meta name="twitter:site" content="@">
<meta name="twitter:creator" content="@">
<meta property="og:title" content="About">
<meta property="og:description" content="About mCaptcha">
<meta property="og:type" content="article">
<meta property="og:url" content="/about/">
<meta property="og:image" content="/icon.png"/>
<meta property="article:published_time" content="2021-05-27T00:00:00+00:00">
<meta property="article:modified_time" content="2023-05-29T16:01:44-04:00">
<meta property="og:site_name" content="mCaptcha">
<meta property="article:publisher" content="https://www.facebook.com/">
<meta property="article:author" content="https://www.facebook.com/">
<meta property="og:locale" content="en_US">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "BreadcrumbList",
"itemListElement": [{
"@type": "ListItem",
"position": 1 ,
"name": "Home",
"item": "\/"
},{
"@type": "ListItem",
"position": 2 ,
"name": "About",
"item": "\/about\/"
}]
}
</script>
<meta name="theme-color" content="#fff">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="manifest" href="/site.webmanifest">
</head>
<body class="page single">
<div class="header-bar fixed-top"></div>
<header class="navbar fixed-top navbar-expand-md navbar-light">
<div class="container">
<input class="menu-btn order-0" type="checkbox" id="menu-btn">
<label class="menu-icon d-md-none" for="menu-btn"><span class="navicon"></span></label>
<a class="navbar-brand order-1 order-md-0 me-auto" href="/">mCaptcha</a>
<button id="mode" class="btn btn-link order-2 order-md-4" type="button" aria-label="Toggle mode">
<span class="toggle-dark"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"></path></svg></span>
<span class="toggle-light"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"></circle><line x1="12" y1="1" x2="12" y2="3"></line><line x1="12" y1="21" x2="12" y2="23"></line><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line><line x1="1" y1="12" x2="3" y2="12"></line><line x1="21" y1="12" x2="23" y2="12"></line><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line></svg></span>
</button>
<ul class="navbar-nav social-nav order-3 order-md-5">
<li class="nav-item">
<a class="nav-link" href="https://github.com/mCaptcha"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"></path></svg><span class="ms-2 visually-hidden">GitHub</span></a>
</li>
</ul>
<div class="collapse navbar-collapse order-4 order-md-1">
<ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class="nav-item">
<a class="nav-link" href="/blog/">Blog</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/community/">Community</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/contact/">Contact</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="/about/">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/docs/webmasters/installing-captcha/">Docs</a>
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<p>mCaptcha is a kickass CAPTCHA systems that gives (DDoS)
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your users. Oh and did I mention our UX is great?</p>
<p>At mCaptcha, we believe in digital freedom and privacy and so we built
your users. Oh and did I mention our UX is great?</p><p>At mCaptcha, we believe in digital freedom and privacy and so we built
a proof-of-work based CAPTCHA system that doesn’t track. Seriously, no
tracking. But that isn’t the killer feature, our system doesn’t require
the user to pick cars or ID sidewalks — our system does it’s
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<h2 id="philosophy">Philosophy<a href="#philosophy" class="anchor" aria-hidden="true">#</a> </h2>
<p>Man has has come so far only because our ancestors chose to share their
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knowledge with others. If everything was labeled intellectual property,
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<p><strong><a href="https://batsense.net">Aravinth Mavniannan</a>:</strong>
Author</p>
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<p><strong><a href="https://sibichakkaravarthy.github.io/">Prof. Sibi Chakkaravarthy
available(both as in freedom and beers) at our <a href=https://github.com/mCaptcha>GitHub</a>.</p><h2 id=people>People<a href=#people class=anchor aria-hidden=true>#</a></h2><ul><li><p><strong><a href=https://batsense.net>Aravinth Mavniannan</a>:</strong>
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Sethuraman</a>:</strong> Mentor and
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<h1>December, 2021: Monthly Report</h1>
<p><small>Posted December 23, 2021 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited June 14, 2022</small><p>
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<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>Hello and welcome to the first edition of the monthly report!</p>
<p>I believe free software like mCaptcha is critical to a healthy internet
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>December, 2021: Monthly Report - mCaptcha</title><meta name=description content="New features, improved accessibility and software integrations"><link rel=canonical href=/blog/december-2021-monthly-report/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/blog/december-2021-monthly-report/icon.png"><meta name=twitter:title content="December, 2021: Monthly Report"><meta name=twitter:description content="New features, improved accessibility and software integrations"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="December, 2021: Monthly Report"><meta property="og:description" content="New features, improved accessibility and software integrations"><meta property="og:type" content="article"><meta property="og:url" content="/blog/december-2021-monthly-report/"><meta property="og:image" content="/blog/december-2021-monthly-report/icon.png"><meta property="article:published_time" content="2021-12-23T00:00:00+00:00"><meta property="article:modified_time" content="2022-06-14T15:39:59+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Blogdecember 2021 Monthly Report","item":"\/blogdecember-2021-monthly-report\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="blog single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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but being a one-person show, there&rsquo;s hardly any accountability in the
way software is built. I hope, through monthly reports, I can explain
the logic and intentions behind decisions taken in the development
process.</p>
<p>This month, the following things were accomplished:</p>
<h2 id="1-full-librejs-compliance">1. Full LibreJS Compliance</h2>
<p>The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_20x0_resize_q75_box.jpg" data-srcset="/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_500x0_resize_q75_box.jpg 500w" width="915" height="908" alt="Screenshot of mCaptcha admin dashboard with GNU LibreJS extension&#39;s report in frame.LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the AGPL license.">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_500x0_resize_q75_box.jpg 500w" src="/blog/december-2021-monthly-report/librejs-dashboard.jpg" width="915" height="908" alt="Screenshot of mCaptcha admin dashboard with GNU LibreJS extension&#39;s report in frame.LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the AGPL license."></noscript>
<figcaption class="figure-caption">LibreJS report of the dashboard webpage</figcaption>
</figure>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_20x0_resize_q75_box.jpg" data-srcset="/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_500x0_resize_q75_box.jpg 500w" width="904" height="913" alt="Screenshot of mCaptcha client-side widget(I&#39;m-not-a-robot widget) with GNU LibreJS extension&#39;s report in frame. LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the X11(aka MIT license). It should also detect the Apache licensing but I probably botched it up.">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_500x0_resize_q75_box.jpg 500w" src="/blog/december-2021-monthly-report/librejs-widget.jpg" width="904" height="913" alt="Screenshot of mCaptcha client-side widget(I&#39;m-not-a-robot widget) with GNU LibreJS extension&#39;s report in frame. LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the X11(aka MIT license). It should also detect the Apache licensing but I probably botched it up."></noscript>
<figcaption class="figure-caption">LibreJS report of the CAPTCHA widget webpage</figcaption>
</figure>
<h2 id="2-javascript-polyfill">2. JavaScript PolyFill</h2>
<p>mCaptcha relied on a WebAssembly(WASM) port of the proof-of-work
process.</p><p>This month, the following things were accomplished:</p><h2 id=1-full-librejs-compliance>1. Full LibreJS Compliance</h2><p>The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_20x0_resize_q75_box.jpg data-srcset="/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_500x0_resize_q75_box.jpg 500w" width=915 height=908 alt="Screenshot of mCaptcha admin dashboard with GNU LibreJS extension's report in frame.LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the AGPL license."><noscript><img class=img-fluid sizes=100vw srcset="/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-dashboard_hu856cef05000f9a4e09e1cd208f2ef170_101197_500x0_resize_q75_box.jpg 500w" src=/blog/december-2021-monthly-report/librejs-dashboard.jpg width=915 height=908 alt="Screenshot of mCaptcha admin dashboard with GNU LibreJS extension's report in frame.LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the AGPL license."></noscript><figcaption class=figure-caption>LibreJS report of the dashboard webpage</figcaption></figure><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_20x0_resize_q75_box.jpg data-srcset="/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_500x0_resize_q75_box.jpg 500w" width=904 height=913 alt="Screenshot of mCaptcha client-side widget(I'm-not-a-robot widget) with GNU LibreJS extension's report in frame. LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the X11(aka MIT license). It should also detect the Apache licensing but I probably botched it up."><noscript><img class=img-fluid sizes=100vw srcset="/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/librejs-widget_hu9a63940a47bb530d2d35b12edf31107a_83817_500x0_resize_q75_box.jpg 500w" src=/blog/december-2021-monthly-report/librejs-widget.jpg width=904 height=913 alt="Screenshot of mCaptcha client-side widget(I'm-not-a-robot widget) with GNU LibreJS extension's report in frame. LibreJS reports that all scripts in this webpage are accepted(and hence free software) and are licensed under the X11(aka MIT license). It should also detect the Apache licensing but I probably botched it up."></noscript><figcaption class=figure-caption>LibreJS report of the CAPTCHA widget webpage</figcaption></figure><h2 id=2-javascript-polyfill>2. JavaScript PolyFill</h2><p>mCaptcha relied on a WebAssembly(WASM) port of the proof-of-work
algorithm used in mCaptcha. This meanth browsers without WASM support
couldn&rsquo;t process CAPTCHAs. This month, <a href="https://github.com/mCaptcha/pow_sha256-polyfill">a pure JavaScript(TypeScript,
technically) implementation
</a> was released to
overcome this limitation.</p>
<h2 id="3-integration-libraries-for-vanilla-js-react-and-svelte">3. Integration libraries for Vanilla JS, React and Svelte:</h2>
<p>To make migration from existing CAPTCHA deployments to mCaptha,
integration libraries for <a href="https://www.npmjs.com/package/@mcaptcha/vanilla-glue">Vanilla
JS</a>, <a href="https://www.npmjs.com/package/@mcaptcha/react-glue">React
couldn&rsquo;t process CAPTCHAs. This month, <a href=https://github.com/mCaptcha/pow_sha256-polyfill>a pure JavaScript(TypeScript,
technically) implementation</a> was released to
overcome this limitation.</p><h2 id=3-integration-libraries-for-vanilla-js-react-and-svelte>3. Integration libraries for Vanilla JS, React and Svelte:</h2><p>To make migration from existing CAPTCHA deployments to mCaptha,
integration libraries for <a href=https://www.npmjs.com/package/@mcaptcha/vanilla-glue>Vanilla
JS</a>, <a href=https://www.npmjs.com/package/@mcaptcha/react-glue>React
Js</a> and
<a href="https://www.npmjs.com/package/@mcaptcha/svelte-glue">Svelte</a> with
<a href=https://www.npmjs.com/package/@mcaptcha/svelte-glue>Svelte</a> with
similar APIs very similar to that of Google&rsquo;s reCAPTCHA and Cloudflare&rsquo;s
hCaptcha.</p>
<ul>
<li>Source code: <a href="https://github.com/mCaptcha/glue">mCaptcha/glue</a></li>
</ul>
<h1 id="4-beginner-friendly-captcha-configuration-options">4. Beginner friendly CAPTCHA configuration options.</h1>
<p>The original configuration panel offers a comprehensive but daunting
task for folks that are justgetting started with mCaptcha.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_20x0_resize_q75_box.jpg" data-srcset="/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_500x0_resize_q75_box.jpg 500w" width="819" height="741" alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with advance configuration options">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_500x0_resize_q75_box.jpg 500w" src="/blog/december-2021-monthly-report/captcha-advanced-config.jpg" width="819" height="741" alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with advance configuration options"></noscript>
<figcaption class="figure-caption">CAPTCHA creation with advance configuration options</figcaption>
</figure>
<p>A new CAPTCHA creation format is rolled out which generates a
hCaptcha.</p><ul><li>Source code: <a href=https://github.com/mCaptcha/glue>mCaptcha/glue</a></li></ul><h1 id=4-beginner-friendly-captcha-configuration-options>4. Beginner friendly CAPTCHA configuration options.</h1><p>The original configuration panel offers a comprehensive but daunting
task for folks that are justgetting started with mCaptcha.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_20x0_resize_q75_box.jpg data-srcset="/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_500x0_resize_q75_box.jpg 500w" width=819 height=741 alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with advance configuration options"><noscript><img class=img-fluid sizes=100vw srcset="/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-advanced-config_hu83b247380bbc427ee7cad0c8f4eadaf3_44711_500x0_resize_q75_box.jpg 500w" src=/blog/december-2021-monthly-report/captcha-advanced-config.jpg width=819 height=741 alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with advance configuration options"></noscript><figcaption class=figure-caption>CAPTCHA creation with advance configuration options</figcaption></figure><p>A new CAPTCHA creation format is rolled out which generates a
configuration from familiar metrics like average, peak and traffic that
took the user&rsquo;s website down.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_20x0_resize_q75_box.jpg" data-srcset="/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_500x0_resize_q75_box.jpg 500w" width="776" height="556" alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with easy configuration options">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_500x0_resize_q75_box.jpg 500w" src="/blog/december-2021-monthly-report/captcha-easy-config.jpg" width="776" height="556" alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with easy configuration options"></noscript>
<figcaption class="figure-caption">CAPTCHA creation with easy configuration options</figcaption>
</figure>
<p>Of course, the advance option is available and can always be swished to
at any moment!</p>
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took the user&rsquo;s website down.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_20x0_resize_q75_box.jpg data-srcset="/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_500x0_resize_q75_box.jpg 500w" width=776 height=556 alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with easy configuration options"><noscript><img class=img-fluid sizes=100vw srcset="/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_900x0_resize_q75_box.jpg 900w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_800x0_resize_q75_box.jpg 800w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_700x0_resize_q75_box.jpg 700w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_600x0_resize_q75_box.jpg 600w,/blog/december-2021-monthly-report/captcha-easy-config_hue77a6c4a0bac5cb1e9727416c4edcb91_41711_500x0_resize_q75_box.jpg 500w" src=/blog/december-2021-monthly-report/captcha-easy-config.jpg width=776 height=556 alt="Screenshot of mCaptcha admin dashboard CAPTCHA creation form with easy configuration options"></noscript><figcaption class=figure-caption>CAPTCHA creation with easy configuration options</figcaption></figure><p>Of course, the advance option is available and can always be swished to
at any moment!</p></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/may-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">&larr; May, 2022: Monthly Report</div></div></a><a class=ms-auto href=/blog/survey/><div class="card my-1"><div class="card-body py-2">Survey &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/12-21-monthly-report/index.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<h1>February, 2023: Monthly Report</h1>
<p><small>Posted March 8, 2023 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited March 9, 2023</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>Hello and welcome to the (August 2022 to) February, 2023 monthly report!</p>
<h2 id="tldr">TL;DR</h2>
<p><em><a href="https://gusted.xyz">Gusted</a> and I secured funding from NLnet to work
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>February, 2023: Monthly Report - mCaptcha</title><meta name=description content="Gusted and I secured funding from NLnet to work on mCaptcha in 2023, we suffered an outage from 15 January to February 6, polyfill benchmarking support in mCaptcha"><link rel=canonical href=/blog/february-2023-monthly-report/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/blog/february-2023-monthly-report/icon.png"><meta name=twitter:title content="February, 2023: Monthly Report"><meta name=twitter:description content="Gusted and I secured funding from NLnet to work on mCaptcha in 2023, we suffered an outage from 15 January to February 6, polyfill benchmarking support in mCaptcha"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="February, 2023: Monthly Report"><meta property="og:description" content="Gusted and I secured funding from NLnet to work on mCaptcha in 2023, we suffered an outage from 15 January to February 6, polyfill benchmarking support in mCaptcha"><meta property="og:type" content="article"><meta property="og:url" content="/blog/february-2023-monthly-report/"><meta property="og:image" content="/blog/february-2023-monthly-report/icon.png"><meta property="article:published_time" content="2023-03-08T00:00:00+00:00"><meta property="article:modified_time" content="2023-03-09T02:30:43+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Blogfebruary 2023 Monthly Report","item":"\/blogfebruary-2023-monthly-report\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="blog single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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on mCaptcha in 2023, we suffered an outage from 15 January to February
6, polyfill benchmarking support in mCaptcha</em></p>
<h2 id="we-have-funding">We have funding!</h2>
<p><a href="https://gusted.xyz">Gusted</a> and I applied and secured funding through
2023 development is funded through the <a href="https://nlnet.nl/entrust">NGI0
Entrust</a> Fund, via <a href="https://nlnet.nl">NLnet</a>.</p>
<p>The full list of tasks that we&rsquo;ll be working on in the period is is
6, polyfill benchmarking support in mCaptcha</em></p><h2 id=we-have-funding>We have funding!</h2><p><a href=https://gusted.xyz>Gusted</a> and I applied and secured funding through
2023 development is funded through the <a href=https://nlnet.nl/entrust>NGI0
Entrust</a> Fund, via <a href=https://nlnet.nl>NLnet</a>.</p><p>The full list of tasks that we&rsquo;ll be working on in the period is is
available
<a href="https://git.batsense.net/mCaptcha/2023-NLnet/projects/6">here</a>.</p>
<h2 id="infrastructure-outage-15-january-2023-to-february-6-2023">Infrastructure outage: 15 January, 2023 to February 6, 2023</h2>
<p>A hard disk on of the servers hosting mCaptcha infrastructure failed,
<a href=https://git.batsense.net/mCaptcha/2023-NLnet/projects/6>here</a>.</p><h2 id=infrastructure-outage-15-january-2023-to-february-6-2023>Infrastructure outage: 15 January, 2023 to February 6, 2023</h2><p>A hard disk on of the servers hosting mCaptcha infrastructure failed,
which caused the outage. Fixing the hard disk lead to additional
problems, the fan on that server was failing and we couldn&rsquo;t get spares
sooner.</p>
<p>We had current backups, so there was no data loss.</p>
<p>Going forward, we are planning to create Infrastructure-as-Code to fully
sooner.</p><p>We had current backups, so there was no data loss.</p><p>Going forward, we are planning to create Infrastructure-as-Code to fully
restore all mCaptcha infrastructure, so that in the even of an outage,
we could restore our infrastructure in much shorter duration.</p>
<h2 id="mcaptchasurvey-now-includes-polyfill-benchmarking">mCaptcha/survey now includes polyfill benchmarking</h2>
<p>mCaptcha/survey runs benchmarks with mCaptcha&rsquo;s PoW algorithm to collect
we could restore our infrastructure in much shorter duration.</p><h2 id=mcaptchasurvey-now-includes-polyfill-benchmarking>mCaptcha/survey now includes polyfill benchmarking</h2><p>mCaptcha/survey runs benchmarks with mCaptcha&rsquo;s PoW algorithm to collect
statistics on how mCaptcha performs on various browsers and devices. So
far, we&rsquo;ve only been running benchmarks with the WebAssembly
implementation. This <a href="https://github.com/mCaptcha/survey/pull/14">pull request</a> added support for running benchmarks
implementation. This <a href=https://github.com/mCaptcha/survey/pull/14>pull request</a> added support for running benchmarks
with the JavaScript polyfill implementation on browsers without
WebAssembly support.</p>
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<description>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer Denial-of-Service protection, because of its excellent accessibility characteristics. PoW within mCaptcha is configuration &amp;mdash; webmasters can configure difficulty factors for their installations, which determines waiting time for visitors. But PoW can become inaccessible if webmasters choose a very high difficulty factor. So they have to maintain a balance which imposes sufficient load on DDoS attackers while also being accessible to common folk.</description>
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<description>Hello and welcome to the (August 2022 to) February, 2023 monthly report!
<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Blog on</title><link>/blog/</link><description>Recent content in Blog on</description><generator>Hugo -- gohugo.io</generator><language>en-US</language><atom:link href="/blog/index.xml" rel="self" type="application/rss+xml"/><item><title>Introducing mCaptcha net</title><link>/blog/introducing-mcaptcha-net/</link><pubDate>Thu, 19 Oct 2023 00:00:00 +0000</pubDate><guid>/blog/introducing-mcaptcha-net/</guid><description>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer Denial-of-Service protection, because of its excellent accessibility characteristics. PoW within mCaptcha is configuration &amp;mdash; webmasters can configure difficulty factors for their installations, which determines waiting time for visitors. But PoW can become inaccessible if webmasters choose a very high difficulty factor. So they have to maintain a balance which imposes sufficient load on DDoS attackers while also being accessible to common folk.</description></item><item><title>February, 2023: Monthly Report</title><link>/blog/february-2023-monthly-report/</link><pubDate>Wed, 08 Mar 2023 00:00:00 +0000</pubDate><guid>/blog/february-2023-monthly-report/</guid><description>Hello and welcome to the (August 2022 to) February, 2023 monthly report!
TL;DR Gusted and I secured funding from NLnet to work on mCaptcha in 2023, we suffered an outage from 15 January to February 6, polyfill benchmarking support in mCaptcha
We have funding! Gusted and I applied and secured funding through 2023 development is funded through the NGI0 Entrust Fund, via NLnet.
The full list of tasks that we&amp;rsquo;ll be working on in the period is is available here.</description>
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<description>Hello and welcome to the July, 2022 monthly report!
The full list of tasks that we&amp;rsquo;ll be working on in the period is is available here.</description></item><item><title>July, 2022: Monthly Report</title><link>/blog/july-2022-monthly-report/</link><pubDate>Thu, 04 Aug 2022 00:00:00 +0000</pubDate><guid>/blog/july-2022-monthly-report/</guid><description>Hello and welcome to the July, 2022 monthly report!
TL;DR Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support, mCaptcha supports MariaDB, I&amp;rsquo;ve applied for NLnet and Open Tech Fund, documentation is updated: tutorials and glossary is added and glue libraries have new releases.
Codeberg is deploying mCaptcha Codeberg is committed to trying out mCaptcha to make their platform more accessible: they currently use a text-based CAPTCHA, which will be replaced by mCaptcha.</description>
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<title>June, 2022: Monthly Report</title>
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<pubDate>Thu, 07 Jul 2022 00:00:00 +0000</pubDate>
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<description>Hello and welcome to the June 2022 edition of the monthly report!
Codeberg is deploying mCaptcha Codeberg is committed to trying out mCaptcha to make their platform more accessible: they currently use a text-based CAPTCHA, which will be replaced by mCaptcha.</description></item><item><title>June, 2022: Monthly Report</title><link>/blog/june-2022-monthly-report/</link><pubDate>Thu, 07 Jul 2022 00:00:00 +0000</pubDate><guid>/blog/june-2022-monthly-report/</guid><description>Hello and welcome to the June 2022 edition of the monthly report!
mCaptcha is incorporated! I spent June doing non-technical tasks but I made significant progress: I had been trying to do it since summer 2021, but I faced various setbacks along the way. A family friend, who is also an auditor helped me finally get mCaptcha incorporated!
And we&amp;rsquo;ve already filed successfully filed the first tax return too!
GSTIN 33DGKPA2253J1ZN Ideas for Commercial Operations Commercial operations will take a while longer(end of 2022, most probably).</description>
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<title>May, 2022: Monthly Report</title>
<link>/blog/may-2022-monthly-report/</link>
<pubDate>Fri, 10 Jun 2022 00:00:00 +0000</pubDate>
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<description>Hello and welcome to the May 2022 edition of the monthly report!
GSTIN 33DGKPA2253J1ZN Ideas for Commercial Operations Commercial operations will take a while longer(end of 2022, most probably).</description></item><item><title>May, 2022: Monthly Report</title><link>/blog/may-2022-monthly-report/</link><pubDate>Fri, 10 Jun 2022 00:00:00 +0000</pubDate><guid>/blog/may-2022-monthly-report/</guid><description>Hello and welcome to the May 2022 edition of the monthly report!
mCaptcha, for a while was showing all the signs of a dead project: no commits on the repositories and no monthly updates. But the project is far from dead!
Python bindings to mCaptcha PoW pow_py contains bindings to pow_sha256, the proof-of-work library that mCaptcha uses. For the uninitiated, the bindings allow for python programs to automatically solve mCaptcha.</description>
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<title>December, 2021: Monthly Report</title>
<link>/blog/december-2021-monthly-report/</link>
<pubDate>Thu, 23 Dec 2021 00:00:00 +0000</pubDate>
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<description>Hello and welcome to the first edition of the monthly report!
Python bindings to mCaptcha PoW pow_py contains bindings to pow_sha256, the proof-of-work library that mCaptcha uses. For the uninitiated, the bindings allow for python programs to automatically solve mCaptcha.</description></item><item><title>December, 2021: Monthly Report</title><link>/blog/december-2021-monthly-report/</link><pubDate>Thu, 23 Dec 2021 00:00:00 +0000</pubDate><guid>/blog/december-2021-monthly-report/</guid><description>Hello and welcome to the first edition of the monthly report!
I believe free software like mCaptcha is critical to a healthy internet but being a one-person show, there&amp;rsquo;s hardly any accountability in the way software is built. I hope, through monthly reports, I can explain the logic and intentions behind decisions taken in the development process.
This month, the following things were accomplished:
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description>
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<guid>/blog/survey/</guid>
<description>Survey link: https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description></item><item><title>Survey</title><link>/blog/survey/</link><pubDate>Thu, 28 Oct 2021 00:00:00 +0000</pubDate><guid>/blog/survey/</guid><description>Survey link: https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about
NOTE: The survey(at least, the lucky draw is temporarily suspended due to some logistical reasons. Apologies for any inconvenience caused.
mCaptcha relies on a proof-of-work(PoW) mechanism to guard against bots. In order for this to be effective, the difficulty factor should be configured properly. If the difficulty factor is too high all the time, it will inconvenience the users and if it&amp;rsquo;s too low during attack, the defence will be weak.</description>
</item>
<item>
<title>PoW performance</title>
<link>/blog/pow-performance/</link>
<pubDate>Wed, 01 Sep 2021 00:00:00 +0000</pubDate>
<guid>/blog/pow-performance/</guid>
<description>mCaptcha uses a proof-of-work(PoW) mechanism to rate limit users or potential bots. In order for this to be effective, the PoW should be configured properly. The difficulty requirement can&amp;rsquo;t be too high, as it could cause accessibility issues on the client-side while at the same time, it shouldn&amp;rsquo;t be too low, as it wouldn&amp;rsquo;t offer proper protection against bots.
Malicious bots(the ones that wreak havoc), run native code which is capable of running in a multi-threaded context.</description>
</item>
<item>
<title>Say hello to mCaptcha</title>
<link>/blog/say-hello-to-mcaptcha/</link>
<pubDate>Wed, 26 May 2021 00:00:00 +0000</pubDate>
<guid>/blog/say-hello-to-mcaptcha/</guid>
<description>At mCaptcha, we believe in digital freedom and privacy and so we built a proof-of-work based CAPTCHA system that doesn&amp;rsquo;t track. Seriously, no tracking. But that isn&amp;rsquo;t the killer feature, our system doesn&amp;rsquo;t require the user to pick cars or ID sidewalks &amp;mdash; our system does it&amp;rsquo;s thing(usually at the click of a button) and gets out of the way.
How does it work? mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</description>
</item>
</channel>
</rss>
mCaptcha relies on a proof-of-work(PoW) mechanism to guard against bots. In order for this to be effective, the difficulty factor should be configured properly. If the difficulty factor is too high all the time, it will inconvenience the users and if it&amp;rsquo;s too low during attack, the defence will be weak.</description></item><item><title>PoW performance</title><link>/blog/pow-performance/</link><pubDate>Wed, 01 Sep 2021 00:00:00 +0000</pubDate><guid>/blog/pow-performance/</guid><description>mCaptcha uses a proof-of-work(PoW) mechanism to rate limit users or potential bots. In order for this to be effective, the PoW should be configured properly. The difficulty requirement can&amp;rsquo;t be too high, as it could cause accessibility issues on the client-side while at the same time, it shouldn&amp;rsquo;t be too low, as it wouldn&amp;rsquo;t offer proper protection against bots.
Malicious bots(the ones that wreak havoc), run native code which is capable of running in a multi-threaded context.</description></item><item><title>Say hello to mCaptcha</title><link>/blog/say-hello-to-mcaptcha/</link><pubDate>Wed, 26 May 2021 00:00:00 +0000</pubDate><guid>/blog/say-hello-to-mcaptcha/</guid><description>At mCaptcha, we believe in digital freedom and privacy and so we built a proof-of-work based CAPTCHA system that doesn&amp;rsquo;t track. Seriously, no tracking. But that isn&amp;rsquo;t the killer feature, our system doesn&amp;rsquo;t require the user to pick cars or ID sidewalks &amp;mdash; our system does it&amp;rsquo;s thing(usually at the click of a button) and gets out of the way.
How does it work? mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</description></item></channel></rss>

244
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<li><a href="#participation-is-optional">Participation is optional</a></li>
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<h1>Introducing mCaptcha net</h1>
<p><small>Posted October 19, 2023 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited October 21, 2023</small><p>
</div>
<p class="lead"></p>
<p>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer
Denial-of-Service protection, because of <a href="https://www.w3.org/TR/turingtest/#proof-of-work">its excellent accessibility
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>Introducing mCaptcha net - mCaptcha</title><meta name=description content="A network of mCaptcha instances sharing PoW stats to make mCaptcha more efficient and accessible"><link rel=canonical href=/blog/introducing-mcaptcha-net/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/blog/introducing-mcaptcha-net/icon.png"><meta name=twitter:title content="Introducing mCaptcha net"><meta name=twitter:description content="A network of mCaptcha instances sharing PoW stats to make mCaptcha more efficient and accessible"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="Introducing mCaptcha net"><meta property="og:description" content="A network of mCaptcha instances sharing PoW stats to make mCaptcha more efficient and accessible"><meta property="og:type" content="article"><meta property="og:url" content="/blog/introducing-mcaptcha-net/"><meta property="og:image" content="/blog/introducing-mcaptcha-net/icon.png"><meta property="article:published_time" content="2023-10-19T00:00:00+00:00"><meta property="article:modified_time" content="2023-10-21T16:48:55+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Blogintroducing Mcaptcha Net","item":"\/blogintroducing-mcaptcha-net\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="blog single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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Denial-of-Service protection, because of <a href=https://www.w3.org/TR/turingtest/#proof-of-work>its excellent accessibility
characteristics</a>. PoW
within mCaptcha is configuration &mdash; webmasters can configure
<a href="/docs/terminology/difficulty-factor">difficulty factors</a> for their
<a href=/docs/terminology/difficulty-factor>difficulty factors</a> for their
installations, which determines waiting time for visitors. But PoW can
become inaccessible if webmasters choose a very high difficulty factor.
So they have to maintain a balance which imposes sufficient load on DDoS
attackers while also being accessible to common folk.</p>
<div class="alert alert-warning d-flex" role="alert">
<div class="flex-shrink-1 alert-icon">⭐</div>
<div class="w-100"> mCaptcha installation: integration of the mCaptcha widget to a service.</div>
</div>
<p>To help webmasters correctly configure difficult factors, we are
attackers while also being accessible to common folk.</p><div class="alert alert-warning d-flex" role=alert><div class="flex-shrink-1 alert-icon">⭐</div><div class=w-100>mCaptcha installation: integration of the mCaptcha widget to a service.</div></div><p>To help webmasters correctly configure difficult factors, we are
building a feedback loop which would gather performance statistics from
voluntary mCaptcha installations and make them available to other
mCaptcha installations. The performance statistics can be used by all
mCaptcha instances to automatically optimize an installation. We are
calling this the mCaptcha net.</p>
<h2 id="participation-is-optional">Participation is optional</h2>
<p>Participation in the mCaptcha net is disabled by default and is
calling this the mCaptcha net.</p><h2 id=participation-is-optional>Participation is optional</h2><p>Participation in the mCaptcha net is disabled by default and is
optional as it has privacy implications: it will reveal the
existence of an mCaptcha instance.</p>
<p>The admins of mCaptcha instances can choose to upload truly anonymous
PoW performance statistics to a number of <a href="https://git.batsense.net/mCaptcha/survey">mCaptcha/survey</a> instances.
existence of an mCaptcha instance.</p><p>The admins of mCaptcha instances can choose to upload truly anonymous
PoW performance statistics to a number of <a href=https://git.batsense.net/mCaptcha/survey>mCaptcha/survey</a> instances.
The data uploaded is public and so is accessible to all mCaptcha
instances.</p>
<p>We also offer opt-in controls at installation level:</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_20x0_resize_box_3.png" data-srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_3.png 500w" width="759" height="745" alt="A screenshot of the &#39;add sitekey&#39; form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default.">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_3.png 500w" src="/blog/introducing-mcaptcha-net/installation-level-opt-in.png" width="759" height="745" alt="A screenshot of the &#39;add sitekey&#39; form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default."></noscript>
<figcaption class="figure-caption">Add sitekey form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default.</figcaption>
</figure>
<h2 id="ensuring-anonymity">Ensuring anonymity</h2>
<p>mCaptcha doesn&rsquo;t fingerprint its users. Performance parameters include:</p>
<ol>
<li>Time taken to generate PoW</li>
<li>The difficulty factor for which the PoW was computed</li>
<li>Type of client library used.</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-json" data-lang="json"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span><span style="color:#f1fa8c">&#34;time&#34;</span>:<span style="color:#bd93f9">14</span>,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span><span style="color:#f1fa8c">&#34;difficulty_factor&#34;</span>:<span style="color:#bd93f9">50000</span>,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3</span><span><span style="color:#f1fa8c">&#34;worker_type&#34;</span>:<span style="color:#f1fa8c">&#34;wasm&#34;</span>
</span></span></code></pre></div><p>This doesn&rsquo;t include the usual fingerprinting parameters like
instances.</p><p>We also offer opt-in controls at installation level:</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_20x0_resize_box_2.png data-srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_2.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_2.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_2.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_2.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_2.png 500w" width=759 height=745 alt="A screenshot of the 'add sitekey' form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default."><noscript><img class=img-fluid sizes=100vw srcset="/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_900x0_resize_box_2.png 900w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_800x0_resize_box_2.png 800w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_700x0_resize_box_2.png 700w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_600x0_resize_box_2.png 600w,/blog/introducing-mcaptcha-net/installation-level-opt-in_huf73c7a9ce7ec84ce553fffad281cd7ba_53366_500x0_resize_box_2.png 500w" src=/blog/introducing-mcaptcha-net/installation-level-opt-in.png width=759 height=745 alt="A screenshot of the 'add sitekey' form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default."></noscript><figcaption class=figure-caption>Add sitekey form on the mCaptcha dashboard with a checkbox for anonymously publishing performance statistics. It is not checked by default.</figcaption></figure><h2 id=ensuring-anonymity>Ensuring anonymity</h2><p>mCaptcha doesn&rsquo;t fingerprint its users. Performance parameters include:</p><ol><li>Time taken to generate PoW</li><li>The difficulty factor for which the PoW was computed</li><li>Type of client library used.</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-json data-lang=json><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span><span style=color:#f1fa8c>&#34;time&#34;</span>:<span style=color:#bd93f9>14</span>,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span><span style=color:#f1fa8c>&#34;difficulty_factor&#34;</span>:<span style=color:#bd93f9>50000</span>,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span><span style=color:#f1fa8c>&#34;worker_type&#34;</span>:<span style=color:#f1fa8c>&#34;wasm&#34;</span>
</code></pre></div><p>This doesn&rsquo;t include the usual fingerprinting parameters like
User-Agent, cookies, and IP address. Additionally, we use pseudo IDs
at both mCaptcha/mCaptcha and mCaptcha/survey to avoid exposing installations.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_20x0_resize_box_3.png" data-srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_3.png 500w" width="1842" height="1008" alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_3.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_3.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_3.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_3.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_3.png 500w" src="/blog/introducing-mcaptcha-net/working-rpc.png" width="1842" height="1008" alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother"></noscript>
<figcaption class="figure-caption">mCaptcha/mCaptcha uploading performance statistics to a mCaptcha/survey instance</figcaption>
</figure>
<h2 id="status">Status</h2>
<p>We now have performance statistics uploads to mCaptcha/survey instances
working. Pull request <a href="https://github.com/mCaptcha/mCaptcha/pull/92">mCaptcha/mCaptcha#92</a>
at both mCaptcha/mCaptcha and mCaptcha/survey to avoid exposing installations.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_20x0_resize_box_2.png data-srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_2.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_2.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_2.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_2.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_2.png 500w" width=1842 height=1008 alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother"><noscript><img class=img-fluid sizes=100vw srcset="/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_900x0_resize_box_2.png 900w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_800x0_resize_box_2.png 800w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_700x0_resize_box_2.png 700w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_600x0_resize_box_2.png 600w,/blog/introducing-mcaptcha-net/working-rpc_huca78e586ec60552618ec5b6b3f0d9a9a_322974_500x0_resize_box_2.png 500w" src=/blog/introducing-mcaptcha-net/working-rpc.png width=1842 height=1008 alt="A screenshot of a tmux window with logs of mCaptcha/mCaptcha and mCapctha/survey showing both of them talking to eachother"></noscript><figcaption class=figure-caption>mCaptcha/mCaptcha uploading performance statistics to a mCaptcha/survey instance</figcaption></figure><h2 id=status>Status</h2><p>We now have performance statistics uploads to mCaptcha/survey instances
working. Pull request <a href=https://github.com/mCaptcha/mCaptcha/pull/92>mCaptcha/mCaptcha#92</a>
added abilities to mCaptcha to upload statistics to mCaptcha/survey instances and
<a href="https://git.batsense.net/mCaptcha/survey/pulls/17">mCaptcha/survey#40</a> enable survey to process the uploaded data. We will soon build a
<a href=https://git.batsense.net/mCaptcha/survey/pulls/17>mCaptcha/survey#40</a> enable survey to process the uploaded data. We will soon build a
self-tuning algorithm within mCaptcha to use this data and optimize
installations automatically.</p>
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<h1>July, 2022: Monthly Report</h1>
<p><small>Posted August 4, 2022 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited February 13, 2023</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>Hello and welcome to the July, 2022 monthly report!</p>
<h2 id="tldr">TL;DR</h2>
<p><em>Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support,
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>July, 2022: Monthly Report - mCaptcha</title><meta name=description content="Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support, mCaptcha supports MariaDB, I've applied for NLnet and Open Tech Fund, documentation is updated: tutorials and glossary is added and glue libraries have new releases."><link rel=canonical href=/blog/july-2022-monthly-report/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/blog/july-2022-monthly-report/icon.png"><meta name=twitter:title content="July, 2022: Monthly Report"><meta name=twitter:description content="Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support, mCaptcha supports MariaDB, I've applied for NLnet and Open Tech Fund, documentation is updated: tutorials and glossary is added and glue libraries have new releases."><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="July, 2022: Monthly Report"><meta property="og:description" content="Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support, mCaptcha supports MariaDB, I've applied for NLnet and Open Tech Fund, documentation is updated: tutorials and glossary is added and glue libraries have new releases."><meta property="og:type" content="article"><meta property="og:url" content="/blog/july-2022-monthly-report/"><meta property="og:image" content="/blog/july-2022-monthly-report/icon.png"><meta property="article:published_time" content="2022-08-04T00:00:00+00:00"><meta property="article:modified_time" content="2023-02-13T14:50:39+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Blogjuly 2022 Monthly Report","item":"\/blogjuly-2022-monthly-report\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="blog single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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mCaptcha supports MariaDB, I&rsquo;ve applied for NLnet and Open Tech Fund,
documentation is updated: tutorials and glossary is added and glue libraries
have new releases.</em></p>
<h2 id="codeberg-is-deploying-mcaptcha">Codeberg is deploying mCaptcha</h2>
<p>Codeberg is committed to trying out mCaptcha to make their platform more
have new releases.</em></p><h2 id=codeberg-is-deploying-mcaptcha>Codeberg is deploying mCaptcha</h2><p>Codeberg is committed to trying out mCaptcha to make their platform more
accessible: they currently use a text-based CAPTCHA, which will be
replaced by mCaptcha. The decision was finalized after I presented
mCaptcha to them at a meeting their organized. Please see
<a href="https://batsense.net/talks/codeberg-introducing-mcaptcha/">here</a> for
slides.</p>
<h2 id="gitea-gets-mcaptcha-support">Gitea gets mCaptcha support</h2>
<p><a href="https://gusted.xyz">@Gusted</a> from Codeberg is working on integrating
<a href=https://batsense.net/talks/codeberg-introducing-mcaptcha/>here</a> for
slides.</p><h2 id=gitea-gets-mcaptcha-support>Gitea gets mCaptcha support</h2><p><a href=https://gusted.xyz>@Gusted</a> from Codeberg is working on integrating
mCaptcha in Gitea so that Codeberg can deploy it. Please see
<a href="https://github.com/go-gitea/gitea/pull/20458">here</a> for related the
pull request.</p>
<p>This project is yet to see usage, so we are venturing into uncharted
<a href=https://github.com/go-gitea/gitea/pull/20458>here</a> for related the
pull request.</p><p>This project is yet to see usage, so we are venturing into uncharted
territory: should you face issues with either deploying or
integrating mCaptcha, please feel free <a href="/community">to reach out</a>.</p>
<h2 id="mcaptcha-supports-mariadb">mCaptcha supports MariaDB:</h2>
<p>Codeberg uses MariaDB. To facilitate Codeberg deployment, I implemented
support for MariaDB. <a href="https://mcaptcha.org/blog/may-2022-monthly-report#refactor">The work done in
integrating mCaptcha, please feel free <a href=/community>to reach out</a>.</p><h2 id=mcaptcha-supports-mariadb>mCaptcha supports MariaDB:</h2><p>Codeberg uses MariaDB. To facilitate Codeberg deployment, I implemented
support for MariaDB. <a href=https://mcaptcha.org/blog/may-2022-monthly-report#refactor>The work done in
May, 2022</a> made
implementing support easy. Support for MariaDB is first class in
mCaptcha: automatic testing exist to run tests with both Postgres and
MariaDB, so I expect things to be stable.</p>
<h2 id="applied-for-funding-nlnet-and-open-tech-fund">Applied for Funding: NLnet and Open Tech Fund</h2>
<p>I&rsquo;ve applied for NLnet and Open Tech Fund[0], Please find the
MariaDB, so I expect things to be stable.</p><h2 id=applied-for-funding-nlnet-and-open-tech-fund>Applied for Funding: NLnet and Open Tech Fund</h2><p>I&rsquo;ve applied for NLnet and Open Tech Fund[0], Please find the
applications
<a href="https://forum.forgefriends.org/t/mcaptcha-nlnet-grant-application-august-2022/830/3">here</a>
<a href=https://forum.forgefriends.org/t/mcaptcha-nlnet-grant-application-august-2022/830/3>here</a>
and
<a href="https://forum.forgefriends.org/t/mcaptcha-nlnet-grant-application-august-2022/830/3">here</a>
respectively.</p>
<p>If funding is granted:</p>
<ol>
<li>I&rsquo;ll be able to work full-time for a year at the rate of 2,000 EUR/month</li>
<li>We&rsquo;ll have a dedicated build server</li>
<li>We&rsquo;ll have funds to run a DDoS test to gauge mCaptcha&rsquo;s effectiveness</li>
</ol>
<h2 id="documentation-updates">Documentation updates</h2>
<p>mCaptcha docs over the months have become inconsistent and incorrect. I
cleaned up some of the mess and added <a href="/docs/introduction/installing-captcha/">a
<a href=https://forum.forgefriends.org/t/mcaptcha-nlnet-grant-application-august-2022/830/3>here</a>
respectively.</p><p>If funding is granted:</p><ol><li>I&rsquo;ll be able to work full-time for a year at the rate of 2,000 EUR/month</li><li>We&rsquo;ll have a dedicated build server</li><li>We&rsquo;ll have funds to run a DDoS test to gauge mCaptcha&rsquo;s effectiveness</li></ol><h2 id=documentation-updates>Documentation updates</h2><p>mCaptcha docs over the months have become inconsistent and incorrect. I
cleaned up some of the mess and added <a href=/docs/introduction/installing-captcha/>a
tutorial</a> to help folks install
mCaptcha on their website. The docs also gets <a href="/docs/terminology/access-token/">a
mCaptcha on their website. The docs also gets <a href=/docs/terminology/access-token/>a
glossary</a>, which contain explanations
to mCaptcha jargon.</p>
<h2 id="new-releases-glue-libraries">New releases: glue libraries</h2>
<p><code>0.1.0-alpha-2</code> for
<a href="https://www.npmjs.com/package/@mcaptcha/vanilla-glue">vanilla</a>,
<a href="https://www.npmjs.com/package/@mcaptcha/react-glue">react</a> and
<a href="https://www.npmjs.com/package/@mcaptcha/svelte-glue">svelte</a> glue
to mCaptcha jargon.</p><h2 id=new-releases-glue-libraries>New releases: glue libraries</h2><p><code>0.1.0-alpha-2</code> for
<a href=https://www.npmjs.com/package/@mcaptcha/vanilla-glue>vanilla</a>,
<a href=https://www.npmjs.com/package/@mcaptcha/react-glue>react</a> and
<a href=https://www.npmjs.com/package/@mcaptcha/svelte-glue>svelte</a> glue
libraries were released. They now hand over widget sizing to the client
code(<a href="https://github.com/mCaptcha/glue/pull/12">associated PR</a>).</p>
<h2 id="footnotes">Footnotes</h2>
<ul>
<li>[0]: Special thanks to
<a href="https://mastodon.social/@humanetech">@humantech</a> for his thoughtful
reviews and to <a href="https://dachary.org">@dachary</a> for pointing me towards
OTF.</li>
</ul>
</article>
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code(<a href=https://github.com/mCaptcha/glue/pull/12>associated PR</a>).</p><h2 id=footnotes>Footnotes</h2><ul><li>[0]: Special thanks to
<a href=https://mastodon.social/@humanetech>@humantech</a> for his thoughtful
reviews and to <a href=https://dachary.org>@dachary</a> for pointing me towards
OTF.</li></ul></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/february-2023-monthly-report/><div class="card my-1"><div class="card-body py-2">&larr; February, 2023: Monthly Report</div></div></a><a class=ms-auto href=/blog/june-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">June, 2022: Monthly Report &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/07-22-monthly-report/index.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<h1>June, 2022: Monthly Report</h1>
<p><small>Posted July 7, 2022 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited July 7, 2022</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>Hello and welcome to the June 2022 edition of the monthly report!</p>
<h2 id="mcaptcha-is-incorporated">mCaptcha is incorporated!</h2>
<p>I spent June doing non-technical tasks but I made significant
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progress: I had been trying to do it since summer 2021, but I faced
various setbacks along the way. A family friend, who is also an auditor
helped me finally get mCaptcha incorporated!</p>
<p>And we&rsquo;ve already filed successfully filed the first tax return too!</p>
<h3 id="gstin">GSTIN</h3>
<pre tabindex="0"><code>33DGKPA2253J1ZN
</code></pre><h2 id="ideas-for-commercial-operations">Ideas for Commercial Operations</h2>
<p>Commercial operations will take a while longer(end of 2022, most
probably). For <a href="https://hostea.org">Hostea</a>, I wrote a dashboard with
helped me finally get mCaptcha incorporated!</p><p>And we&rsquo;ve already filed successfully filed the first tax return too!</p><h3 id=gstin>GSTIN</h3><pre><code>33DGKPA2253J1ZN
</code></pre><h2 id=ideas-for-commercial-operations>Ideas for Commercial Operations</h2><p>Commercial operations will take a while longer(end of 2022, most
probably). For <a href=https://hostea.org>Hostea</a>, I wrote a dashboard with
payments capabilities(via Stripe) so that experience will help me do the
same for mCaptcha. Working on Hostea has been truly enlightening: it&rsquo;s
probably the first effort to offer a fully libre, infrastructure-as-code
and payments software included, hosting service. I would like to do the
same for mCaptcha so that service that I setup goes rogue or if someone
wants to offer mCaptcha hosted services, they can replicate my set up
with ease.</p>
<p>But the commercial offering will at no point force me or future
with ease.</p><p>But the commercial offering will at no point force me or future
maintainers turn mCaptcha into adopting a non-free license like the
<a href="https://www.mongodb.com/licensing/server-side-public-license">Server Side Public
<a href=https://www.mongodb.com/licensing/server-side-public-license>Server Side Public
License</a>.
So the following months will see administrative changes within mCaptcha
to device mechanisms to prevent me or any future party with influence in
mCaptcha development from hurting the project by it non-free.</p>
<p>Hostea is also an experiment in Free Software commercial operations, so
mCaptcha development from hurting the project by it non-free.</p><p>Hostea is also an experiment in Free Software commercial operations, so
naturally I&rsquo;m highly impressed by the ideas that are being discussed
there. mCaptcha, too, will borrow ideas from that project to make its
development economically sustainable.</p>
</article>
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May, 2022: Monthly Report &rarr;
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<h1>May, 2022: Monthly Report</h1>
<p><small>Posted June 10, 2022 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>4&nbsp;min read</strong></small><p>
<p><small>Last Edited June 14, 2022</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>Hello and welcome to the May 2022 edition of the monthly report!</p>
<p>mCaptcha, for a while was showing all the signs of a dead project:
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>May, 2022: Monthly Report - mCaptcha</title><meta name=description content="Python bindings to mCaptcha PoW, DDoS effectiveness measurement, major refactoring to prepare for support for other databases, We also tried to test its DoS defence effectiveness, and some exciting news regarding managed hosting!"><link rel=canonical href=/blog/may-2022-monthly-report/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/blog/may-2022-monthly-report/icon.png"><meta name=twitter:title content="May, 2022: Monthly Report"><meta name=twitter:description content="Python bindings to mCaptcha PoW, DDoS effectiveness measurement, major refactoring to prepare for support for other databases, We also tried to test its DoS defence effectiveness, and some exciting news regarding managed hosting!"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="May, 2022: Monthly Report"><meta property="og:description" content="Python bindings to mCaptcha PoW, DDoS effectiveness measurement, major refactoring to prepare for support for other databases, We also tried to test its DoS defence effectiveness, and some exciting news regarding managed hosting!"><meta property="og:type" content="article"><meta property="og:url" content="/blog/may-2022-monthly-report/"><meta property="og:image" content="/blog/may-2022-monthly-report/icon.png"><meta property="article:published_time" content="2022-06-10T00:00:00+00:00"><meta property="article:modified_time" content="2022-06-14T15:39:59+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Blogmay 2022 Monthly Report","item":"\/blogmay-2022-monthly-report\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="blog single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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no commits on the repositories and no monthly updates. But the project
is far from dead!</p>
<h2 id="python-bindings-to-mcaptcha-powhttpsgithubcommcaptchapow_sha256">Python bindings to <a href="https://github.com/mCaptcha/pow_sha256/">mCaptcha PoW</a></h2>
<p><a href="https://github.com/mCaptcha/pow_py">pow_py</a> contains bindings to
<a href="https://github.com/mCaptcha/pow_sha256">pow_sha256</a>, the
<a href="https://en.wikipedia.org/wiki/Proof_of_work">proof-of-work</a> library
is far from dead!</p><h2 id=python-bindings-to-mcaptcha-powhttpsgithubcommcaptchapow_sha256>Python bindings to <a href=https://github.com/mCaptcha/pow_sha256/>mCaptcha PoW</a></h2><p><a href=https://github.com/mCaptcha/pow_py>pow_py</a> contains bindings to
<a href=https://github.com/mCaptcha/pow_sha256>pow_sha256</a>, the
<a href=https://en.wikipedia.org/wiki/Proof_of_work>proof-of-work</a> library
that mCaptcha uses. For the uninitiated, the bindings allow for python
programs to automatically solve mCaptcha.</p>
<p>So if you are writing a script to do some chore on your favourite
programs to automatically solve mCaptcha.</p><p>So if you are writing a script to do some chore on your favourite
website that is protected by mCaptcha, you can now solve the mCaptcha
automatically from within the program.</p>
<p>Here&rsquo;s an example:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-python" data-lang="python"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 1</span><span><span style="color:#ff79c6">import</span> os
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 2</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 3</span><span><span style="color:#ff79c6">import</span> mcaptcha_pow_py
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 4</span><span><span style="color:#ff79c6">import</span> requests
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 5</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 6</span><span><span style="color:#6272a4"># get the sitekey that is used in the mCaptcha protected form</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 7</span><span>SITEKEY <span style="color:#ff79c6">=</span> os<span style="color:#ff79c6">.</span>getenv(<span style="color:#f1fa8c">&#34;MCAPTCHA_CAPTCHA_SITEKEY&#34;</span>)
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 8</span><span><span style="color:#6272a4"># the hostname of the mCaptcha instance that the form is using</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f"> 9</span><span>MCAPTCHA_HOST <span style="color:#ff79c6">=</span> os<span style="color:#ff79c6">.</span>getenv(<span style="color:#f1fa8c">&#34;MCAPTCHA_CAPTCHA_HOST&#34;</span>)
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">10</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">11</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">12</span><span>GET_CONFIG_ROUTE <span style="color:#ff79c6">=</span> <span style="color:#f1fa8c">f</span><span style="color:#f1fa8c">&#34;</span><span style="color:#f1fa8c">{</span>MCAPTCHA_HOST<span style="color:#f1fa8c">}</span><span style="color:#f1fa8c">/api/v1/pow/config&#34;</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">13</span><span>VERIFY_POW_ROUTE <span style="color:#ff79c6">=</span> <span style="color:#f1fa8c">f</span><span style="color:#f1fa8c">&#34;</span><span style="color:#f1fa8c">{</span>MCAPTCHA_HOST<span style="color:#f1fa8c">}</span><span style="color:#f1fa8c">/api/v1/pow/verify&#34;</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">14</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">15</span><span><span style="color:#ff79c6">def</span> <span style="color:#50fa7b">solve_captcha</span>():
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">16</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">17</span><span> <span style="color:#6272a4"># get challenge configuration</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">18</span><span> key <span style="color:#ff79c6">=</span> {<span style="color:#f1fa8c">&#34;key&#34;</span>: sitekey}
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">19</span><span> challenge_config <span style="color:#ff79c6">=</span> requests<span style="color:#ff79c6">.</span>post(GET_CONFIG_ROUTE, json<span style="color:#ff79c6">=</span>key)
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">20</span><span> challenge_config <span style="color:#ff79c6">=</span> challenge_config<span style="color:#ff79c6">.</span>json()
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">21</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">22</span><span> <span style="color:#6272a4"># extract configuration data</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">23</span><span> config <span style="color:#ff79c6">=</span> mcaptcha_pow_py<span style="color:#ff79c6">.</span>PoWConfig(challenge_config[<span style="color:#f1fa8c">&#34;salt&#34;</span>])
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">24</span><span> pow_string <span style="color:#ff79c6">=</span> challenge_config[<span style="color:#f1fa8c">&#34;string&#34;</span>]
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">25</span><span> pow_difficulty_factor <span style="color:#ff79c6">=</span> challenge_config[<span style="color:#f1fa8c">&#34;difficulty_factor&#34;</span>]
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">26</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">27</span><span> <span style="color:#6272a4"># generate work</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">28</span><span> work <span style="color:#ff79c6">=</span> config<span style="color:#ff79c6">.</span>work(pow_string, pow_difficulty_factor)
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">29</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">30</span><span> <span style="color:#6272a4"># verify PoW</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">31</span><span> proof <span style="color:#ff79c6">=</span> {
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">32</span><span> <span style="color:#f1fa8c">&#34;key&#34;</span>: SITEKEY,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">33</span><span> <span style="color:#f1fa8c">&#34;nonce&#34;</span>: work<span style="color:#ff79c6">.</span>nonce,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">34</span><span> <span style="color:#f1fa8c">&#34;result&#34;</span>: work<span style="color:#ff79c6">.</span>result,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">35</span><span> <span style="color:#f1fa8c">&#34;string&#34;</span>: challenge_config[<span style="color:#f1fa8c">&#34;string&#34;</span>],
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">36</span><span> }
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">37</span><span> resp <span style="color:#ff79c6">=</span> requests<span style="color:#ff79c6">.</span>post(VERIFY_POW_ROUTE, json<span style="color:#ff79c6">=</span>proof)
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">38</span><span> resp <span style="color:#ff79c6">=</span> resp<span style="color:#ff79c6">.</span>json()
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">39</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">40</span><span> <span style="color:#6272a4"># extract verification token</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">41</span><span> token <span style="color:#ff79c6">=</span> resp[<span style="color:#f1fa8c">&#34;token&#34;</span>]
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">42</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">43</span><span> <span style="color:#ff79c6">return</span> token
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">44</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">45</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">46</span><span>token <span style="color:#ff79c6">=</span> solve_captcha()
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">47</span><span>data <span style="color:#ff79c6">=</span> {
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">48</span><span> <span style="color:#f1fa8c">&#34;username&#34;</span>: <span style="color:#f1fa8c">&#34;me&#34;</span>,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">49</span><span> <span style="color:#f1fa8c">&#34;password&#34;</span>: <span style="color:#f1fa8c">&#34;superlongpassword&#34;</span>,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">50</span><span> <span style="color:#f1fa8c">&#34;confirm_password&#34;</span>: <span style="color:#f1fa8c">&#34;superlongpassword&#34;</span>,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">51</span><span> <span style="color:#f1fa8c">&#34;mcaptcha__token&#34;</span>: token,
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">52</span><span>}
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">53</span><span>response <span style="color:#ff79c6">=</span> requests<span style="color:#ff79c6">.</span>post(<span style="color:#f1fa8c">&#34;/mCaptcha-protected-form&#34;</span>, data<span style="color:#ff79c6">=</span>data)
</span></span></code></pre></div><p>This could be missed for building DDoS bots(more on that
<a href="#measuring-ddos-protection-effectiveness">here</a>) but this could also be
automatically from within the program.</p><p>Here&rsquo;s an example:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-python data-lang=python><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 1</span><span style=color:#ff79c6>import</span> os
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 2</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 3</span><span style=color:#ff79c6>import</span> mcaptcha_pow_py
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 4</span><span style=color:#ff79c6>import</span> requests
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 5</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 6</span><span style=color:#6272a4># get the sitekey that is used in the mCaptcha protected form</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 7</span>SITEKEY <span style=color:#ff79c6>=</span> os<span style=color:#ff79c6>.</span>getenv(<span style=color:#f1fa8c>&#34;MCAPTCHA_CAPTCHA_SITEKEY&#34;</span>)
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 8</span><span style=color:#6272a4># the hostname of the mCaptcha instance that the form is using</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 9</span>MCAPTCHA_HOST <span style=color:#ff79c6>=</span> os<span style=color:#ff79c6>.</span>getenv(<span style=color:#f1fa8c>&#34;MCAPTCHA_CAPTCHA_HOST&#34;</span>)
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">10</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">11</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">12</span>GET_CONFIG_ROUTE <span style=color:#ff79c6>=</span> f<span style=color:#f1fa8c>&#34;{MCAPTCHA_HOST}/api/v1/pow/config&#34;</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">13</span>VERIFY_POW_ROUTE <span style=color:#ff79c6>=</span> f<span style=color:#f1fa8c>&#34;{MCAPTCHA_HOST}/api/v1/pow/verify&#34;</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">14</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">15</span><span style=color:#ff79c6>def</span> <span style=color:#50fa7b>solve_captcha</span>():
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">16</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">17</span> <span style=color:#6272a4># get challenge configuration</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">18</span> key <span style=color:#ff79c6>=</span> {<span style=color:#f1fa8c>&#34;key&#34;</span>: sitekey}
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">19</span> challenge_config <span style=color:#ff79c6>=</span> requests<span style=color:#ff79c6>.</span>post(GET_CONFIG_ROUTE, json<span style=color:#ff79c6>=</span>key)
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">20</span> challenge_config <span style=color:#ff79c6>=</span> challenge_config<span style=color:#ff79c6>.</span>json()
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">21</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">22</span> <span style=color:#6272a4># extract configuration data</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">23</span> config <span style=color:#ff79c6>=</span> mcaptcha_pow_py<span style=color:#ff79c6>.</span>PoWConfig(challenge_config[<span style=color:#f1fa8c>&#34;salt&#34;</span>])
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">24</span> pow_string <span style=color:#ff79c6>=</span> challenge_config[<span style=color:#f1fa8c>&#34;string&#34;</span>]
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">25</span> pow_difficulty_factor <span style=color:#ff79c6>=</span> challenge_config[<span style=color:#f1fa8c>&#34;difficulty_factor&#34;</span>]
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">26</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">27</span> <span style=color:#6272a4># generate work</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">28</span> work <span style=color:#ff79c6>=</span> config<span style=color:#ff79c6>.</span>work(pow_string, pow_difficulty_factor)
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">29</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">30</span> <span style=color:#6272a4># verify PoW</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">31</span> proof <span style=color:#ff79c6>=</span> {
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">32</span> <span style=color:#f1fa8c>&#34;key&#34;</span>: SITEKEY,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">33</span> <span style=color:#f1fa8c>&#34;nonce&#34;</span>: work<span style=color:#ff79c6>.</span>nonce,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">34</span> <span style=color:#f1fa8c>&#34;result&#34;</span>: work<span style=color:#ff79c6>.</span>result,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">35</span> <span style=color:#f1fa8c>&#34;string&#34;</span>: challenge_config[<span style=color:#f1fa8c>&#34;string&#34;</span>],
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">36</span> }
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">37</span> resp <span style=color:#ff79c6>=</span> requests<span style=color:#ff79c6>.</span>post(VERIFY_POW_ROUTE, json<span style=color:#ff79c6>=</span>proof)
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">38</span> resp <span style=color:#ff79c6>=</span> resp<span style=color:#ff79c6>.</span>json()
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">39</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">40</span> <span style=color:#6272a4># extract verification token</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">41</span> token <span style=color:#ff79c6>=</span> resp[<span style=color:#f1fa8c>&#34;token&#34;</span>]
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">42</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">43</span> <span style=color:#ff79c6>return</span> token
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">44</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">45</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">46</span>token <span style=color:#ff79c6>=</span> solve_captcha()
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">47</span>data <span style=color:#ff79c6>=</span> {
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">48</span> <span style=color:#f1fa8c>&#34;username&#34;</span>: <span style=color:#f1fa8c>&#34;me&#34;</span>,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">49</span> <span style=color:#f1fa8c>&#34;password&#34;</span>: <span style=color:#f1fa8c>&#34;superlongpassword&#34;</span>,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">50</span> <span style=color:#f1fa8c>&#34;confirm_password&#34;</span>: <span style=color:#f1fa8c>&#34;superlongpassword&#34;</span>,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">51</span> <span style=color:#f1fa8c>&#34;mcaptcha__token&#34;</span>: token,
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">52</span>}
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">53</span>response <span style=color:#ff79c6>=</span> requests<span style=color:#ff79c6>.</span>post(<span style=color:#f1fa8c>&#34;/mCaptcha-protected-form&#34;</span>, data<span style=color:#ff79c6>=</span>data)
</code></pre></div><p>This could be missed for building DDoS bots(more on that
<a href=#measuring-ddos-protection-effectiveness>here</a>) but this could also be
used to make CAPTCHA solving automated within screen readers and other
accessibility devices!</p>
<h2 id="measuring-ddos-protection-effectiveness">Measuring DDoS protection effectiveness</h2>
<p>Proof-of-work has historically been a good method to achieve rate
accessibility devices!</p><h2 id=measuring-ddos-protection-effectiveness>Measuring DDoS protection effectiveness</h2><p>Proof-of-work has historically been a good method to achieve rate
limiting but how much attack can it, specifically mCaptcha&rsquo;s
implementation, withstand when compared to an unprotected endpoint? To
find out, we used the recently created Python bindings to the mCaptcha
PoW library, the excellent load testing tool,
<a href="https://locust.io">locust</a> and wrote
<a href="https://github.com/mCaptcha/dos">mCaptcha/dos</a>!</p>
<p><a href="https://vitap.ac.in">VIT AP</a> kindly permitted me, @realaravinth, to use their network
<a href=https://locust.io>locust</a> and wrote
<a href=https://github.com/mCaptcha/dos>mCaptcha/dos</a>!</p><p><a href=https://vitap.ac.in>VIT AP</a> kindly permitted me, @realaravinth, to use their network
security lab for setting up a isolated, contained testing environment to
mount a DDoS attack on a <a href="https://github.com/mCaptcha/dos/tree/master/rust-server/demo-server">test
mount a DDoS attack on a <a href=https://github.com/mCaptcha/dos/tree/master/rust-server/demo-server>test
server</a>
instance.</p>
<p>The initial topology consisted of one mCaptcha instance, one DDoS demo
instance.</p><p>The initial topology consisted of one mCaptcha instance, one DDoS demo
server, one locust node running in leader configuration and six locust
nodes running in follower configuration. I was authorised to use the
netsec lab for three days, which unfortunately wasn&rsquo;t enough to go
finish running the experiment. <a href="https://sibichakkaravarthy.github.io/">Dr. Sibi Chakkaravarthy
finish running the experiment. <a href=https://sibichakkaravarthy.github.io/>Dr. Sibi Chakkaravarthy
Sethuraman</a> has kindly offered to
arrange authorisation to use the netsec lab once again in July 2022,
during which I hope to finish running the experiment</p>
<p>Special thanks to <a href="http://ackr8.com/">ackr-8</a> and
<a href="https://github.com/alan2000alex">alan2000alex</a> for help with setting up
infrastructure of the experiment.</p>
<h2 id="refactor">Refactor</h2>
<p>mCaptcha underwent a major refactor during the month of May: We re-wrote
during which I hope to finish running the experiment</p><p>Special thanks to <a href=http://ackr8.com/>ackr-8</a> and
<a href=https://github.com/alan2000alex>alan2000alex</a> for help with setting up
infrastructure of the experiment.</p><h2 id=refactor>Refactor</h2><p>mCaptcha underwent a major refactor during the month of May: We re-wrote
and cleaned up all database-related stuff for higher flexibility
and generally good architecture. This refactor lays the foundation
for implementing support for alternate database software
programs(we currently support PostgreSQL only).</p>
<h2 id="mcaptcha-is-now-on-the-fediverse">mCaptcha is now on the Fediverse</h2>
<p>We recently joined the Fediverse on a
<a href="https://docs.gotosocial.org/">GoToSocial</a> instance run by
programs(we currently support PostgreSQL only).</p><h2 id=mcaptcha-is-now-on-the-fediverse>mCaptcha is now on the Fediverse</h2><p>We recently joined the Fediverse on a
<a href=https://docs.gotosocial.org/>GoToSocial</a> instance run by
@realaravinth. We&rsquo;ll soon be deleting our Twitter account in favour of
the Fediverse account.</p>
<p><strong>Fediverse account:</strong>
<a href="https://gts.batsense.net/@mcaptcha">@mCaptcha@batsense.net</a></p>
<h2 id="generic-hosting">Generic hosting</h2>
<p>I, @realaravinth, have been busy with <a href="https://forgeflux.org">ForgeFlux</a>
and <a href="https://hostea.org">Hostea</a> &mdash; both of which are <a href="https://en.wikipedia.org/wiki/Forge_(software)">software
the Fediverse account.</p><p><strong>Fediverse account:</strong>
<a href=https://gts.batsense.net/@mcaptcha>@mCaptcha@batsense.net</a></p><h2 id=generic-hosting>Generic hosting</h2><p>I, @realaravinth, have been busy with <a href=https://forgeflux.org>ForgeFlux</a>
and <a href=https://hostea.org>Hostea</a> &mdash; both of which are <a href=https://en.wikipedia.org/wiki/Forge_(software)>software
forge</a> related and so
when usable, will mostly improve the Free Software ecosystem. Hostea is
a project that aims to create a libre software development ecosystem and
provide managed hosting for the same. The project is <a href="https://forum.hostea.org/t/a-guide-to-hostea-governance/57">built by a
provide managed hosting for the same. The project is <a href=https://forum.hostea.org/t/a-guide-to-hostea-governance/57>built by a
horizontal community</a>, which allows for multiple service providers who
adhere to the Hostea policies to operate
under the Hostea umbrella &mdash; essentially allowing for the creation of
smaller, highly localised cooperatives.</p>
<p>Cooperatives are interesting, and we believe that mCaptcha, too, can
smaller, highly localised cooperatives.</p><p>Cooperatives are interesting, and we believe that mCaptcha, too, can
benefit from such an architecture as it will prevent any one party from
single-handedly sabotaging the project. The experience gained from
Hostea will be reused in providing managed hosting for mCaptcha.</p>
<p>By the end of this year, mCaptcha will reorganise into a horizontal
community and adopt <a href="https://en.wikipedia.org/wiki/Radical_transparency#Radical_corporate_transparency">radical transparency</a> to improve trust and
reliability of the project</p>
<blockquote>
<p>P.S: I, realaravinth, would do it sooner but I&rsquo;m a little busy right
Hostea will be reused in providing managed hosting for mCaptcha.</p><p>By the end of this year, mCaptcha will reorganise into a horizontal
community and adopt <a href=https://en.wikipedia.org/wiki/Radical_transparency#Radical_corporate_transparency>radical transparency</a> to improve trust and
reliability of the project</p><blockquote><p>P.S: I, realaravinth, would do it sooner but I&rsquo;m a little busy right
now, so if someone is interested to help out do reach out and so that
we could do it sooner!</p>
</blockquote>
<p>In context of mCaptcha, radical transparency will include all decisions
we could do it sooner!</p></blockquote><p>In context of mCaptcha, radical transparency will include all decisions
publicly made, funding and expenses publicly documented, and all
collaborations, too, publicly documented. This of course doesn&rsquo;t imply
that private, personally identifiable information(addresses and phone
numbers, for instance) will be publicly disclosed. Such information will
be redacted and published.</p>
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<h1>PoW performance</h1>
<p><small>Posted September 1, 2021 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited September 1, 2021</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>mCaptcha uses a
<a href="https://en.wikipedia.org/wiki/Proof_of_work">proof-of-work(PoW)</a> mechanism
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<a href=https://en.wikipedia.org/wiki/Proof_of_work>proof-of-work(PoW)</a> mechanism
to rate limit users or potential bots. In order for this to be
effective, the PoW should be configured properly. The difficulty
requirement can&rsquo;t be too high, as it could cause accessibility issues on
the client-side while at the same time, it shouldn&rsquo;t be too low, as it
wouldn&rsquo;t offer proper protection against bots.</p>
<p>Malicious bots(the ones that wreak havoc), run native code which is
wouldn&rsquo;t offer proper protection against bots.</p><p>Malicious bots(the ones that wreak havoc), run native code which is
capable of running in a multi-threaded context. This creates an unfair
advantage for crackers using these bots over legitimate users, who
usually use browsers to access a website.</p>
<p>I wanted to see how much of an advantage a native program would have
over our WASM library.</p>
<h2 id="benchmark-tools">Benchmark tools</h2>
<p>So I wrote these to compare native and WASM performances:</p>
<ul>
<li>Browser benchmark: <a href="https://mCaptcha.github.io/benches">https://mCaptcha.github.io/benches</a></li>
<li>Native benchmark: <a href="https://github.com/mCaptcha/cli/blob/master/scripts/bench.sh">mCaptcha/cli managed by scripts/bench.sh</a></li>
</ul>
<div class="alert alert-warning d-flex" role="alert">
<div class="flex-shrink-1 alert-icon">⭐</div>
<div class="w-100">Feel free to reproduce the results!</div>
</div>
<h2 id="results">Results</h2>
<p>The tests were run on my development machine featuring an Intel Core
i7-9750h.</p>
<h3 id="native">Native</h3>
<table>
<thead>
<tr>
<th>Difficulty</th>
<th>Real</th>
<th>User</th>
<th>Sys</th>
</tr>
</thead>
<tbody>
<tr>
<td>500000</td>
<td>0m0.220s</td>
<td>0m0.197s</td>
<td>0m0.006s</td>
</tr>
<tr>
<td>1000000</td>
<td>0m0.203s</td>
<td>0m0.203s</td>
<td>0m0.000s</td>
</tr>
<tr>
<td>1500000</td>
<td>0m0.198s</td>
<td>0m0.198s</td>
<td>0m0.000s</td>
</tr>
<tr>
<td>2000000</td>
<td>0m0.203s</td>
<td>0m0.203s</td>
<td>0m0.000s</td>
</tr>
<tr>
<td>2500000</td>
<td>0m0.758s</td>
<td>0m0.752s</td>
<td>0m0.003s</td>
</tr>
<tr>
<td>3000000</td>
<td>0m0.776s</td>
<td>0m0.769s</td>
<td>0m0.003s</td>
</tr>
<tr>
<td>3500000</td>
<td>0m2.010s</td>
<td>0m1.998s</td>
<td>0m0.000s</td>
</tr>
<tr>
<td>4000000</td>
<td>0m2.038s</td>
<td>0m2.033s</td>
<td>0m0.003s</td>
</tr>
<tr>
<td>4500000</td>
<td>0m2.014s</td>
<td>0m2.013s</td>
<td>0m0.000s</td>
</tr>
</tbody>
</table>
<h3 id="browser">Browser</h3>
<p>I ran the tests on both Firefox and Chromium to compare results</p>
<h3 id="firefox">Firefox</h3>
<ul>
<li><strong>User Agent:</strong> <code>Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0</code></li>
<li><strong>Hardware concurrency:</strong> 12</li>
</ul>
<table>
<thead>
<tr>
<th>Difficulty</th>
<th>Duration(in ms)</th>
</tr>
</thead>
<tbody>
<tr>
<td>500000</td>
<td>401</td>
</tr>
<tr>
<td>1000000</td>
<td>413</td>
</tr>
<tr>
<td>1500000</td>
<td>398</td>
</tr>
<tr>
<td>2000000</td>
<td>394</td>
</tr>
<tr>
<td>2500000</td>
<td>1495</td>
</tr>
<tr>
<td>3000000</td>
<td>1556</td>
</tr>
<tr>
<td>3500000</td>
<td>3971</td>
</tr>
<tr>
<td>4000000</td>
<td>4235</td>
</tr>
<tr>
<td>4500000</td>
<td>4116</td>
</tr>
</tbody>
</table>
<blockquote>
<p>To be fair, my Firefox installation is loaded with a gazillion
usually use browsers to access a website.</p><p>I wanted to see how much of an advantage a native program would have
over our WASM library.</p><h2 id=benchmark-tools>Benchmark tools</h2><p>So I wrote these to compare native and WASM performances:</p><ul><li>Browser benchmark: <a href=https://mCaptcha.github.io/benches>https://mCaptcha.github.io/benches</a></li><li>Native benchmark: <a href=https://github.com/mCaptcha/cli/blob/master/scripts/bench.sh>mCaptcha/cli managed by scripts/bench.sh</a></li></ul><div class="alert alert-warning d-flex" role=alert><div class="flex-shrink-1 alert-icon">⭐</div><div class=w-100>Feel free to reproduce the results!</div></div><h2 id=results>Results</h2><p>The tests were run on my development machine featuring an Intel Core
i7-9750h.</p><h3 id=native>Native</h3><table><thead><tr><th>Difficulty</th><th>Real</th><th>User</th><th>Sys</th></tr></thead><tbody><tr><td>500000</td><td>0m0.220s</td><td>0m0.197s</td><td>0m0.006s</td></tr><tr><td>1000000</td><td>0m0.203s</td><td>0m0.203s</td><td>0m0.000s</td></tr><tr><td>1500000</td><td>0m0.198s</td><td>0m0.198s</td><td>0m0.000s</td></tr><tr><td>2000000</td><td>0m0.203s</td><td>0m0.203s</td><td>0m0.000s</td></tr><tr><td>2500000</td><td>0m0.758s</td><td>0m0.752s</td><td>0m0.003s</td></tr><tr><td>3000000</td><td>0m0.776s</td><td>0m0.769s</td><td>0m0.003s</td></tr><tr><td>3500000</td><td>0m2.010s</td><td>0m1.998s</td><td>0m0.000s</td></tr><tr><td>4000000</td><td>0m2.038s</td><td>0m2.033s</td><td>0m0.003s</td></tr><tr><td>4500000</td><td>0m2.014s</td><td>0m2.013s</td><td>0m0.000s</td></tr></tbody></table><h3 id=browser>Browser</h3><p>I ran the tests on both Firefox and Chromium to compare results</p><h3 id=firefox>Firefox</h3><ul><li><strong>User Agent:</strong> <code>Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0</code></li><li><strong>Hardware concurrency:</strong> 12</li></ul><table><thead><tr><th>Difficulty</th><th>Duration(in ms)</th></tr></thead><tbody><tr><td>500000</td><td>401</td></tr><tr><td>1000000</td><td>413</td></tr><tr><td>1500000</td><td>398</td></tr><tr><td>2000000</td><td>394</td></tr><tr><td>2500000</td><td>1495</td></tr><tr><td>3000000</td><td>1556</td></tr><tr><td>3500000</td><td>3971</td></tr><tr><td>4000000</td><td>4235</td></tr><tr><td>4500000</td><td>4116</td></tr></tbody></table><blockquote><p>To be fair, my Firefox installation is loaded with a gazillion
extensions while the Chromium instance is clean, as I don&rsquo;t use it
much</p>
</blockquote>
<h4 id="chromium">Chromium</h4>
<ul>
<li><strong>User Agent:</strong> <code>Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36</code></li>
<li><strong>Hardware concurrency:</strong> 12</li>
</ul>
<table>
<thead>
<tr>
<th>Difficulty</th>
<th>Duration(in ms)</th>
</tr>
</thead>
<tbody>
<tr>
<td>500000</td>
<td>399.40000000037253</td>
</tr>
<tr>
<td>1000000</td>
<td>354.6000000014901</td>
</tr>
<tr>
<td>1500000</td>
<td>351.19999999925494</td>
</tr>
<tr>
<td>2000000</td>
<td>353.80000000074506</td>
</tr>
<tr>
<td>2500000</td>
<td>1337.800000000745</td>
</tr>
<tr>
<td>3000000</td>
<td>1311.199999999255</td>
</tr>
<tr>
<td>3500000</td>
<td>3417.5999999996275</td>
</tr>
<tr>
<td>4000000</td>
<td>3488.800000000745</td>
</tr>
<tr>
<td>4500000</td>
<td>3458.2999999988824</td>
</tr>
</tbody>
</table>
<h2 id="conclusion">Conclusion</h2>
<p>At the highest difficulty factor, the native implementation was a almost second
much</p></blockquote><h4 id=chromium>Chromium</h4><ul><li><strong>User Agent:</strong> <code>Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36</code></li><li><strong>Hardware concurrency:</strong> 12</li></ul><table><thead><tr><th>Difficulty</th><th>Duration(in ms)</th></tr></thead><tbody><tr><td>500000</td><td>399.40000000037253</td></tr><tr><td>1000000</td><td>354.6000000014901</td></tr><tr><td>1500000</td><td>351.19999999925494</td></tr><tr><td>2000000</td><td>353.80000000074506</td></tr><tr><td>2500000</td><td>1337.800000000745</td></tr><tr><td>3000000</td><td>1311.199999999255</td></tr><tr><td>3500000</td><td>3417.5999999996275</td></tr><tr><td>4000000</td><td>3488.800000000745</td></tr><tr><td>4500000</td><td>3458.2999999988824</td></tr></tbody></table><h2 id=conclusion>Conclusion</h2><p>At the highest difficulty factor, the native implementation was a almost second
faster than the WASM library. But the fact that both of them were able
to run to completion in under 5 seconds is impressive!</p>
<p>So, in my opinion, native implementation is only slightly faster than
to run to completion in under 5 seconds is impressive!</p><p>So, in my opinion, native implementation is only slightly faster than
the WASM library and for all intents and purposes, this shouldn&rsquo;t matter
much.</p>
<hr>
<p>P.S Work is underway to benchmark multiple platforms. A detailed report
will be published when that data is available.</p>
<p>For this post, I asked some of my friends to run the tests on their
much.</p><hr><p>P.S Work is underway to benchmark multiple platforms. A detailed report
will be published when that data is available.</p><p>For this post, I asked some of my friends to run the tests on their
computers. The results slightly varied but even the slowest case
generated proof for 4500000 difficulty(the highest in this test), in under
15 seconds!</p>
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<li><a href="#how-does-it-work">How does it work?</a></li>
<li><a href="#okay-but-what-about-bad-actors">Okay, but what about bad actors?</a></li>
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<h1>Say hello to mCaptcha</h1>
<p><small>Posted May 26, 2021 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>2&nbsp;min read</strong></small><p>
<p><small>Last Edited December 2, 2021</small><p>
</div>
<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p>At mCaptcha, we believe in digital freedom and privacy and so we built a
<a href="https://en.wikipedia.org/wiki/Proof_of_work">proof-of-work</a> based
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<a href=https://en.wikipedia.org/wiki/Proof_of_work>proof-of-work</a> based
CAPTCHA system that doesn&rsquo;t track. Seriously, no tracking. But that
isn&rsquo;t the killer feature, our system doesn&rsquo;t require the user to
pick cars or ID sidewalks &mdash; our system does it&rsquo;s thing(usually
at the click of a button) and gets out of the way.</p>
<h2 id="how-does-it-work">How does it work?</h2>
<p>mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</p>
<p>When a user wants to do something on an mCaptcha-protected website,</p>
<ol>
<li>
<p>they will have to generate proof-of-work(a bunch of math that will
takes time to compute) and submit it to mCaptcha.</p>
</li>
<li>
<p>We&rsquo;ll validate the proof:</p>
</li>
</ol>
<ul>
<li>if validation is unsuccessful, they will be prevented from accessing
the destination website</li>
<li>if validation is successful, read on,</li>
</ul>
<ol start="3">
<li>
<p>They will be issued a token that should be submit along with the
request/form to the destination website.</p>
</li>
<li>
<p>The destination website validates the submitted token with
mCaptcha before processing the request.</p>
</li>
</ol>
<p>The whole process is automated from the user&rsquo;s point of view. All they
have to do is click on a button to initiate the process.</p>
<h2 id="okay-but-what-about-bad-actors">Okay, but what about bad actors?</h2>
<p>mCaptcha makes interacting with websites (computationally)expensive for
at the click of a button) and gets out of the way.</p><h2 id=how-does-it-work>How does it work?</h2><p>mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</p><p>When a user wants to do something on an mCaptcha-protected website,</p><ol><li><p>they will have to generate proof-of-work(a bunch of math that will
takes time to compute) and submit it to mCaptcha.</p></li><li><p>We&rsquo;ll validate the proof:</p></li></ol><ul><li>if validation is unsuccessful, they will be prevented from accessing
the destination website</li><li>if validation is successful, read on,</li></ul><ol start=3><li><p>They will be issued a token that should be submit along with the
request/form to the destination website.</p></li><li><p>The destination website validates the submitted token with
mCaptcha before processing the request.</p></li></ol><p>The whole process is automated from the user&rsquo;s point of view. All they
have to do is click on a button to initiate the process.</p><h2 id=okay-but-what-about-bad-actors>Okay, but what about bad actors?</h2><p>mCaptcha makes interacting with websites (computationally)expensive for
the user. A well-behaving user will experience a slight delay(no delay
when under moderate load to 2-3 seconds when under attack; PoW difficulty is
variable) but if someone wants to hammer your site, they will have to do
more work to send requests than your server you will have to do to respond
to their request.</p>
<h2 id="why-use-mcaptcha">Why use mCaptcha?</h2>
<ul>
<li><strong>Free software, privacy focused</strong></li>
<li><strong>Seamless</strong> UX &mdash; No more annoying CAPTCHAs!</li>
<li><strong>IP address independent:</strong> your users are behind a NAT? We got you covered!</li>
<li><strong>Automatic bot throttling</strong></li>
<li><strong>Resistant to replay attacks:</strong> proof-of-work configurations have short lifetimes(30s) and can be used only once. If a user submits a PoW to an already used configuration or an expired one, their proof will be rejected.</li>
</ul>
<h2 id="how-to-migrate">How to migrate?</h2>
<p>Our client libraries are mostly compatible with reCAPTCHA and hCaptcha.
A detailed guide will be published soon.</p>
<h2 id="our-philosophy">Our Philosophy</h2>
<p>Man has has come so far only because our ancestors chose to
to their request.</p><h2 id=why-use-mcaptcha>Why use mCaptcha?</h2><ul><li><strong>Free software, privacy focused</strong></li><li><strong>Seamless</strong> UX &mdash; No more annoying CAPTCHAs!</li><li><strong>IP address independent:</strong> your users are behind a NAT? We got you covered!</li><li><strong>Automatic bot throttling</strong></li><li><strong>Resistant to replay attacks:</strong> proof-of-work configurations have short lifetimes(30s) and can be used only once. If a user submits a PoW to an already used configuration or an expired one, their proof will be rejected.</li></ul><h2 id=how-to-migrate>How to migrate?</h2><p>Our client libraries are mostly compatible with reCAPTCHA and hCaptcha.
A detailed guide will be published soon.</p><h2 id=our-philosophy>Our Philosophy</h2><p>Man has has come so far only because our ancestors chose to
share their knowledge with others. If everything was labeled
intellectual property, we might still be stuck in Stone Age. The idea of
intellectual property is alien to us. For this reason, all of our source
code is freely available(both as in freedom and beers) at <a href="https://github.com/mCaptcha/">our
GitHub</a>.</p>
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<h1>Survey</h1>
<p><small>Posted October 28, 2021 by <a class="stretched-link position-relative" href="/contributors/aravinth-manivannan/">Aravinth Manivannan</a>&nbsp;&hyphen;&nbsp;<strong>1&nbsp;min read</strong></small><p>
<p><small>Last Edited December 23, 2021</small><p>
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<p class="lead">We are mCaptcha. We build kickass CAPTCHA systems that give (DDoS) attackers a run for their money. And we do all of this without tracking your users. Oh and did I mention our UX is great?</p>
<p><strong>Survey link:</strong> <a href="https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about">https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about</a></p>
<p><strong>NOTE:</strong> The survey(at least, the lucky draw is temporarily suspended
due to some logistical reasons. Apologies for any inconvenience caused.</p>
<p>mCaptcha relies on a
<a href="https://en.wikipedia.org/wiki/Proof_of_work">proof-of-work(PoW)</a>
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due to some logistical reasons. Apologies for any inconvenience caused.</p><p>mCaptcha relies on a
<a href=https://en.wikipedia.org/wiki/Proof_of_work>proof-of-work(PoW)</a>
mechanism to guard against bots. In order for this to be effective, the
difficulty factor should be configured properly. If the difficulty
factor is too high all the time, it will inconvenience the users and if
it&rsquo;s too low during attack, the defence will be weak.</p>
<p>So we are conducting a survey to gather performance benchmarks from
it&rsquo;s too low during attack, the defence will be weak.</p><p>So we are conducting a survey to gather performance benchmarks from
various devices and browsers. The data collected from the survey will be made
public, we believe it will guide sysadmins configure difficulty factor
properly.</p>
<p>If you are interested in the lucky draw, please save the <code>submission ID</code> and the <code>proof</code> will be presented
to you at the end of the survey.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_20x0_resize_q75_box.jpg" data-srcset="/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_900x0_resize_q75_box.jpg 900w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_800x0_resize_q75_box.jpg 800w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_700x0_resize_q75_box.jpg 700w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_600x0_resize_q75_box.jpg 600w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_500x0_resize_q75_box.jpg 500w" width="1129" height="325" alt="survey lucky draw identifier credentials">
<noscript><img class="img-fluid" sizes="100vw" srcset="/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_900x0_resize_q75_box.jpg 900w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_800x0_resize_q75_box.jpg 800w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_700x0_resize_q75_box.jpg 700w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_600x0_resize_q75_box.jpg 600w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_500x0_resize_q75_box.jpg 500w" src="/blog/survey/survey-id.jpg" width="1129" height="325" alt="survey lucky draw identifier credentials"></noscript>
<figcaption class="figure-caption">Lucky draw credentials</figcaption>
</figure>
<h2 id="winners">Winners</h2>
<p>This blog post will be updated with the winning submission IDs and the
winners should provide the matching <code>proof</code> to claim their rewards.</p>
</article>
<div class="docs-navigation d-flex justify-content-between">
<a href="/blog/december-2021-monthly-report/">
<div class="card my-1">
<div class="card-body py-2">
&larr; December, 2021: Monthly Report
</div>
</div>
</a>
<a class="ms-auto" href="/blog/pow-performance/">
<div class="card my-1">
<div class="card-body py-2">
PoW performance &rarr;
</div>
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properly.</p><p>If you are interested in the lucky draw, please save the <code>submission ID</code> and the <code>proof</code> will be presented
to you at the end of the survey.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_20x0_resize_q75_box.jpg data-srcset="/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_900x0_resize_q75_box.jpg 900w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_800x0_resize_q75_box.jpg 800w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_700x0_resize_q75_box.jpg 700w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_600x0_resize_q75_box.jpg 600w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_500x0_resize_q75_box.jpg 500w" width=1129 height=325 alt="survey lucky draw identifier credentials"><noscript><img class=img-fluid sizes=100vw srcset="/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_900x0_resize_q75_box.jpg 900w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_800x0_resize_q75_box.jpg 800w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_700x0_resize_q75_box.jpg 700w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_600x0_resize_q75_box.jpg 600w,/blog/survey/survey-id_huff9ec74d3d162f9d0221fc73fa41d293_43947_500x0_resize_q75_box.jpg 500w" src=/blog/survey/survey-id.jpg width=1129 height=325 alt="survey lucky draw identifier credentials"></noscript><figcaption class=figure-caption>Lucky draw credentials</figcaption></figure><h2 id=winners>Winners</h2><p>This blog post will be updated with the winning submission IDs and the
winners should provide the matching <code>proof</code> to claim their rewards.</p></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/december-2021-monthly-report/><div class="card my-1"><div class="card-body py-2">&larr; December, 2021: Monthly Report</div></div></a><a class=ms-auto href=/blog/pow-performance/><div class="card my-1"><div class="card-body py-2">PoW performance &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/survey/index.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<h1>Community</h1>
<p class="lead"></p>
<h2 id="matrix-community">Matrix Community<a href="#matrix-community" class="anchor" aria-hidden="true">#</a> </h2>
<p>Come say hi at our <a href="https://matrix.to/#/#mcaptcha:matrix.batsense.net">Matrix community</a>!</p>
<h2 id="fediverse-handle">Fediverse handle<a href="#fediverse-handle" class="anchor" aria-hidden="true">#</a> </h2>
<p>We are on the Fediverse at
<a href="https://gts.batsense.net/@mcaptcha">@mCapthca@batsense.net</a>, toot at
us for queries and whatnot :)</p>
<h2 id="official-twitter-handle">Official Twitter handle<a href="#official-twitter-handle" class="anchor" aria-hidden="true">#</a> </h2>
<p>The project also has a twitter twitter presence at <a href="https://twitter.com/m_captcha/">@m_captcha(Nitter
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<a href=https://gts.batsense.net/@mcaptcha>@mCapthca@batsense.net</a>, toot at
us for queries and whatnot :)</p><h2 id=official-twitter-handle>Official Twitter handle<a href=#official-twitter-handle class=anchor aria-hidden=true>#</a></h2><p>The project also has a twitter twitter presence at <a href=https://twitter.com/m_captcha/>@m_captcha(Nitter
hyperlink)</a>. This space is used in
addition to the blog to post short updates.</p>
<h2 id="lead-developer-email">Lead developer email<a href="#lead-developer-email" class="anchor" aria-hidden="true">#</a> </h2>
<p>Write to me at <a href="mailto:realaravinth@batsense.net">realaravinth@batsense.net</a>!</p>
<h2 id="bug-reports">Bug reports<a href="#bug-reports" class="anchor" aria-hidden="true">#</a> </h2>
<p>We use GitHub for managing tickets</p>
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<p>We have a <a href="https://matrix.to/#/+mcaptcha:matrix.batsense.net">Matrix
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community</a>, come say
hi!.</p>
<h2 id="lead-developer">Lead developer<a href="#lead-developer" class="anchor" aria-hidden="true">#</a> </h2>
<p>You can find me(<a href="/contributors/aravinth-manivannan/">@realaravinth</a>) on
the <a href="https://matrix.to/#/@realaravinth:matrix.batsense.net">Matrix</a>, on
<a href="https://github.com/realaravinth">GitHub</a> or email me at
<a href="mailto:realaravinth@batsense.net">realaravinth@batense.net</a>.</p>
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hi!.</p><h2 id=lead-developer>Lead developer<a href=#lead-developer class=anchor aria-hidden=true>#</a></h2><p>You can find me(<a href=/contributors/aravinth-manivannan/>@realaravinth</a>) on
the <a href=https://matrix.to/#/@realaravinth:matrix.batsense.net>Matrix</a>, on
<a href=https://github.com/realaravinth>GitHub</a> or email me at
<a href=mailto:realaravinth@batsense.net>realaravinth@batense.net</a>.</p><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/contact/index.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<title>Introducing mCaptcha net</title>
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<description>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer Denial-of-Service protection, because of its excellent accessibility characteristics. PoW within mCaptcha is configuration &amp;mdash; webmasters can configure difficulty factors for their installations, which determines waiting time for visitors. But PoW can become inaccessible if webmasters choose a very high difficulty factor. So they have to maintain a balance which imposes sufficient load on DDoS attackers while also being accessible to common folk.</description>
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<item>
<title>February, 2023: Monthly Report</title>
<link>/blog/february-2023-monthly-report/</link>
<pubDate>Wed, 08 Mar 2023 00:00:00 +0000</pubDate>
<guid>/blog/february-2023-monthly-report/</guid>
<description>Hello and welcome to the (August 2022 to) February, 2023 monthly report!
<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Aravinth Manivannan on</title><link>/contributors/aravinth-manivannan/</link><description>Recent content in Aravinth Manivannan on</description><generator>Hugo -- gohugo.io</generator><language>en-US</language><lastBuildDate>Wed, 26 May 2021 00:00:00 +0000</lastBuildDate><atom:link href="/contributors/aravinth-manivannan/index.xml" rel="self" type="application/rss+xml"/><item><title>Introducing mCaptcha net</title><link>/blog/introducing-mcaptcha-net/</link><pubDate>Thu, 19 Oct 2023 00:00:00 +0000</pubDate><guid>/blog/introducing-mcaptcha-net/</guid><description>mCaptcha uses a Proof-of-Work (PoW) based algorithm to offer Denial-of-Service protection, because of its excellent accessibility characteristics. PoW within mCaptcha is configuration &amp;mdash; webmasters can configure difficulty factors for their installations, which determines waiting time for visitors. But PoW can become inaccessible if webmasters choose a very high difficulty factor. So they have to maintain a balance which imposes sufficient load on DDoS attackers while also being accessible to common folk.</description></item><item><title>February, 2023: Monthly Report</title><link>/blog/february-2023-monthly-report/</link><pubDate>Wed, 08 Mar 2023 00:00:00 +0000</pubDate><guid>/blog/february-2023-monthly-report/</guid><description>Hello and welcome to the (August 2022 to) February, 2023 monthly report!
TL;DR Gusted and I secured funding from NLnet to work on mCaptcha in 2023, we suffered an outage from 15 January to February 6, polyfill benchmarking support in mCaptcha
We have funding! Gusted and I applied and secured funding through 2023 development is funded through the NGI0 Entrust Fund, via NLnet.
The full list of tasks that we&amp;rsquo;ll be working on in the period is is available here.</description>
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<title>July, 2022: Monthly Report</title>
<link>/blog/july-2022-monthly-report/</link>
<pubDate>Thu, 04 Aug 2022 00:00:00 +0000</pubDate>
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<description>Hello and welcome to the July, 2022 monthly report!
The full list of tasks that we&amp;rsquo;ll be working on in the period is is available here.</description></item><item><title>July, 2022: Monthly Report</title><link>/blog/july-2022-monthly-report/</link><pubDate>Thu, 04 Aug 2022 00:00:00 +0000</pubDate><guid>/blog/july-2022-monthly-report/</guid><description>Hello and welcome to the July, 2022 monthly report!
TL;DR Codeberg is trying out mCaptcha, Gitea is getting mCaptcha support, mCaptcha supports MariaDB, I&amp;rsquo;ve applied for NLnet and Open Tech Fund, documentation is updated: tutorials and glossary is added and glue libraries have new releases.
Codeberg is deploying mCaptcha Codeberg is committed to trying out mCaptcha to make their platform more accessible: they currently use a text-based CAPTCHA, which will be replaced by mCaptcha.</description>
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<item>
<title>June, 2022: Monthly Report</title>
<link>/blog/june-2022-monthly-report/</link>
<pubDate>Thu, 07 Jul 2022 00:00:00 +0000</pubDate>
<guid>/blog/june-2022-monthly-report/</guid>
<description>Hello and welcome to the June 2022 edition of the monthly report!
Codeberg is deploying mCaptcha Codeberg is committed to trying out mCaptcha to make their platform more accessible: they currently use a text-based CAPTCHA, which will be replaced by mCaptcha.</description></item><item><title>June, 2022: Monthly Report</title><link>/blog/june-2022-monthly-report/</link><pubDate>Thu, 07 Jul 2022 00:00:00 +0000</pubDate><guid>/blog/june-2022-monthly-report/</guid><description>Hello and welcome to the June 2022 edition of the monthly report!
mCaptcha is incorporated! I spent June doing non-technical tasks but I made significant progress: I had been trying to do it since summer 2021, but I faced various setbacks along the way. A family friend, who is also an auditor helped me finally get mCaptcha incorporated!
And we&amp;rsquo;ve already filed successfully filed the first tax return too!
GSTIN 33DGKPA2253J1ZN Ideas for Commercial Operations Commercial operations will take a while longer(end of 2022, most probably).</description>
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<title>May, 2022: Monthly Report</title>
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<pubDate>Fri, 10 Jun 2022 00:00:00 +0000</pubDate>
<guid>/blog/may-2022-monthly-report/</guid>
<description>Hello and welcome to the May 2022 edition of the monthly report!
GSTIN 33DGKPA2253J1ZN Ideas for Commercial Operations Commercial operations will take a while longer(end of 2022, most probably).</description></item><item><title>May, 2022: Monthly Report</title><link>/blog/may-2022-monthly-report/</link><pubDate>Fri, 10 Jun 2022 00:00:00 +0000</pubDate><guid>/blog/may-2022-monthly-report/</guid><description>Hello and welcome to the May 2022 edition of the monthly report!
mCaptcha, for a while was showing all the signs of a dead project: no commits on the repositories and no monthly updates. But the project is far from dead!
Python bindings to mCaptcha PoW pow_py contains bindings to pow_sha256, the proof-of-work library that mCaptcha uses. For the uninitiated, the bindings allow for python programs to automatically solve mCaptcha.</description>
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<item>
<title>December, 2021: Monthly Report</title>
<link>/blog/december-2021-monthly-report/</link>
<pubDate>Thu, 23 Dec 2021 00:00:00 +0000</pubDate>
<guid>/blog/december-2021-monthly-report/</guid>
<description>Hello and welcome to the first edition of the monthly report!
Python bindings to mCaptcha PoW pow_py contains bindings to pow_sha256, the proof-of-work library that mCaptcha uses. For the uninitiated, the bindings allow for python programs to automatically solve mCaptcha.</description></item><item><title>December, 2021: Monthly Report</title><link>/blog/december-2021-monthly-report/</link><pubDate>Thu, 23 Dec 2021 00:00:00 +0000</pubDate><guid>/blog/december-2021-monthly-report/</guid><description>Hello and welcome to the first edition of the monthly report!
I believe free software like mCaptcha is critical to a healthy internet but being a one-person show, there&amp;rsquo;s hardly any accountability in the way software is built. I hope, through monthly reports, I can explain the logic and intentions behind decisions taken in the development process.
This month, the following things were accomplished:
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description>
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<title>Survey</title>
<link>/blog/survey/</link>
<pubDate>Thu, 28 Oct 2021 00:00:00 +0000</pubDate>
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<description>Survey link: https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description></item><item><title>Survey</title><link>/blog/survey/</link><pubDate>Thu, 28 Oct 2021 00:00:00 +0000</pubDate><guid>/blog/survey/</guid><description>Survey link: https://survey.mcaptcha.org/survey/campaigns/b717e51e-24d4-4ab6-912f-de2dfe3ce1fe/about
NOTE: The survey(at least, the lucky draw is temporarily suspended due to some logistical reasons. Apologies for any inconvenience caused.
mCaptcha relies on a proof-of-work(PoW) mechanism to guard against bots. In order for this to be effective, the difficulty factor should be configured properly. If the difficulty factor is too high all the time, it will inconvenience the users and if it&amp;rsquo;s too low during attack, the defence will be weak.</description>
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<pubDate>Wed, 01 Sep 2021 00:00:00 +0000</pubDate>
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<description>mCaptcha uses a proof-of-work(PoW) mechanism to rate limit users or potential bots. In order for this to be effective, the PoW should be configured properly. The difficulty requirement can&amp;rsquo;t be too high, as it could cause accessibility issues on the client-side while at the same time, it shouldn&amp;rsquo;t be too low, as it wouldn&amp;rsquo;t offer proper protection against bots.
Malicious bots(the ones that wreak havoc), run native code which is capable of running in a multi-threaded context.</description>
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<title>Say hello to mCaptcha</title>
<link>/blog/say-hello-to-mcaptcha/</link>
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<description>At mCaptcha, we believe in digital freedom and privacy and so we built a proof-of-work based CAPTCHA system that doesn&amp;rsquo;t track. Seriously, no tracking. But that isn&amp;rsquo;t the killer feature, our system doesn&amp;rsquo;t require the user to pick cars or ID sidewalks &amp;mdash; our system does it&amp;rsquo;s thing(usually at the click of a button) and gets out of the way.
How does it work? mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</description>
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mCaptcha relies on a proof-of-work(PoW) mechanism to guard against bots. In order for this to be effective, the difficulty factor should be configured properly. If the difficulty factor is too high all the time, it will inconvenience the users and if it&amp;rsquo;s too low during attack, the defence will be weak.</description></item><item><title>PoW performance</title><link>/blog/pow-performance/</link><pubDate>Wed, 01 Sep 2021 00:00:00 +0000</pubDate><guid>/blog/pow-performance/</guid><description>mCaptcha uses a proof-of-work(PoW) mechanism to rate limit users or potential bots. In order for this to be effective, the PoW should be configured properly. The difficulty requirement can&amp;rsquo;t be too high, as it could cause accessibility issues on the client-side while at the same time, it shouldn&amp;rsquo;t be too low, as it wouldn&amp;rsquo;t offer proper protection against bots.
Malicious bots(the ones that wreak havoc), run native code which is capable of running in a multi-threaded context.</description></item><item><title>Say hello to mCaptcha</title><link>/blog/say-hello-to-mcaptcha/</link><pubDate>Wed, 26 May 2021 00:00:00 +0000</pubDate><guid>/blog/say-hello-to-mcaptcha/</guid><description>At mCaptcha, we believe in digital freedom and privacy and so we built a proof-of-work based CAPTCHA system that doesn&amp;rsquo;t track. Seriously, no tracking. But that isn&amp;rsquo;t the killer feature, our system doesn&amp;rsquo;t require the user to pick cars or ID sidewalks &amp;mdash; our system does it&amp;rsquo;s thing(usually at the click of a button) and gets out of the way.
How does it work? mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</description></item></channel></rss>

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<h1>Browser libraries</h1>
<p class="lead"></p>
<p>The browser part of mCaptcha is divided into three components.</p>
<ul>
<li>Glue code</li>
<li>Widget program</li>
<li>Proof-of-Work libraries(WebAssembly and JavaScript polyfill)</li>
</ul>
<h2 id="glue-code">Glue code<a href="#glue-code" class="anchor" aria-hidden="true">#</a> </h2>
<p>This is the code that links mCaptcha with your website&rsquo;s frontend code.
<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.c5ebec6f69f6fedddbd813e6fbeec336e7050cd17bb6fef39275d0956f6115409a7083647b41bca8cc86d5c0a35d49b0692a89702d12c76f9b8d315ea33c0b87.css integrity="sha512-xevsb2n2/t3b2BPm++7DNucFDNF7tv7zknXQlW9hFUCacINke0G8qMyG1cCjXUmwaSqJcC0Sx2+bjTFeozwLhw==" crossorigin=anonymous><noscript><style>img.lazyload{display:none}</style></noscript><meta name=robots content="index, follow"><meta name=googlebot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><meta name=bingbot content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1"><title>Browser libraries - mCaptcha</title><meta name=description content="API documenttion for mCaptcha WASM library"><link rel=canonical href=/docs/api/browser/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/icon.png"><meta name=twitter:title content="Browser libraries"><meta name=twitter:description content="API documenttion for mCaptcha WASM library"><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="Browser libraries"><meta property="og:description" content="API documenttion for mCaptcha WASM library"><meta property="og:type" content="article"><meta property="og:url" content="/docs/api/browser/"><meta property="og:image" content="/icon.png"><meta property="article:published_time" content="2021-03-11T00:00:00+00:00"><meta property="article:modified_time" content="2022-08-01T20:24:18+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Docsapibrowser","item":"\/docsapibrowser\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="docs single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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<span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class="nav-item active"><a class=nav-link href=/docs/webmasters/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><div class="row flex-xl-nowrap"><div class="col-lg-5 col-xl-4 docs-sidebar"><nav class=docs-links aria-label="Main navigation"><h3>Webmasters</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/webmasters/installing-captcha/>Installing mCaptcha on your website</a></li><li><a class=docs-link href=/docs/webmasters/configuring-difficulty-factor/>Configuring Difficulty Factor</a></li><li><a class=docs-link href=/docs/webmasters/terminology/>Terminology</a></li><li><a class=docs-link href=/docs/webmasters/faq/>Webmasters FAQ</a></li></ul><h3>User Manual</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/user-manual/cli/>CLI tool</a></li><li><a class=docs-link href=/docs/user-manual/how-to-mcaptcha-without-js/>Use mCaptcha without JavaScript</a></li></ul><h3>Self-Hosting</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/self-hosting/getting-started/>Getting started</a></li><li><a class=docs-link href=/docs/self-hosting/bare-metal/>Deploy bare metal</a></li><li><a class=docs-link href=/docs/self-hosting/docker/>Using Docker</a></li><li><a class=docs-link href=/docs/self-hosting/dependencies/>Database and cache</a></li></ul><h3>API</h3><ul class=list-unstyled><li><a class="docs-link active" href=/docs/api/browser/>Browser libraries</a></li><li><a class=docs-link href=/docs/api/mcaptcha-system/>mCaptcha System Library</a></li><li><a class=docs-link href=/docs/api/pow-sha256/>pow_sha256</a></li></ul><h3>Help</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/help/troubleshooting/>Troubleshooting</a></li><li><a class=docs-link href=/docs/help/faq/>FAQ</a></li></ul></nav></div><nav class="docs-toc d-none d-xl-block col-xl-3" aria-label="Secondary navigation"><div class=page-links><h3>On this page</h3><nav id=TableOfContents><ul><li><a href=#glue-code>Glue code</a></li><li><a href=#widget-program>Widget Program</a></li><li><a href=#proof-of-workpow-library>Proof-of-Work(PoW) library</a></li></ul></nav></div></nav><main class="docs-content col-lg-11 col-xl-9"><h1>Browser libraries</h1><p class=lead></p><p>The browser part of mCaptcha is divided into three components.</p><ul><li>Glue code</li><li>Widget program</li><li>Proof-of-Work libraries(WebAssembly and JavaScript polyfill)</li></ul><h2 id=glue-code>Glue code<a href=#glue-code class=anchor aria-hidden=true>#</a></h2><p>This is the code that links mCaptcha with your website&rsquo;s frontend code.
It creates an <code>iframe</code> containing the mCaptcha widget and injects the
received verification proof token into a hidden input field.</p>
<p>Support is available for various frameworks, see
<a href="https://github.com/mCaptcha/glue"><code>mCaptcha/glue</code></a> for the full list.</p>
<p>For frameworks without official support, a low-level library,
<a href="https://www.npmjs.com/package/@mcaptcha/core-glue"><code>@mcaptcha/core-glue</code></a>,
can be used to implement support.</p>
<h2 id="widget-program">Widget Program<a href="#widget-program" class="anchor" aria-hidden="true">#</a> </h2>
<p>This part is served by the mCaptcha backend. It fetches PoW config from
received verification proof token into a hidden input field.</p><p>Support is available for various frameworks, see
<a href=https://github.com/mCaptcha/glue><code>mCaptcha/glue</code></a> for the full list.</p><p>For frameworks without official support, a low-level library,
<a href=https://www.npmjs.com/package/@mcaptcha/core-glue><code>@mcaptcha/core-glue</code></a>,
can be used to implement support.</p><h2 id=widget-program>Widget Program<a href=#widget-program class=anchor aria-hidden=true>#</a></h2><p>This part is served by the mCaptcha backend. It fetches PoW config from
the backend, generates proof and submits it for verification. If
verification is successful, it sends a message containing the
verification proof token to the parent window, assuming it&rsquo;s loaded as
an <code>iframe</code>.</p>
<ul>
<li>Source code:
<a href="https://github.com/mCaptcha/mCaptcha/tree/master/templates/widget"><code>mCaptcha/mCaptcha/templates/widget</code></a></li>
</ul>
<p>WebAssembly library which generates Proofs of Work for mCaptcha systems.</p>
<h2 id="proof-of-workpow-library">Proof-of-Work(PoW) library<a href="#proof-of-workpow-library" class="anchor" aria-hidden="true">#</a> </h2>
<p>WebAssembly bindings(<a href="https://github.com/mCaptcha/pow_wasm"><code>mCaptcha/pow_wasm</code></a>) are available for the main rust library(<a href="https://github.com/mCaptcha/pow_sha256"><code>mCaptcha/pow_sha256</code></a>).</p>
<p>For browsers without support WebAssembly, a
polyfill(<a href="https://github.com/mCaptcha/pow_sha256-polyfill"><code>pow_sha256-polyfill</code></a>)
is available.</p>
<p class="edit-page"><a href="https://git.batsense.net/mCaptcha/website/blob/master/content/docs/API/browser.md"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828 0 1 1 4 4L7.5 20.5 2 22l1.5-5.5L17 3z"></path></svg>Edit this page on git.batsense.net</a></p>
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an <code>iframe</code>.</p><ul><li>Source code:
<a href=https://github.com/mCaptcha/mCaptcha/tree/master/templates/widget><code>mCaptcha/mCaptcha/templates/widget</code></a></li></ul><p>WebAssembly library which generates Proofs of Work for mCaptcha systems.</p><h2 id=proof-of-workpow-library>Proof-of-Work(PoW) library<a href=#proof-of-workpow-library class=anchor aria-hidden=true>#</a></h2><p>WebAssembly bindings(<a href=https://github.com/mCaptcha/pow_wasm><code>mCaptcha/pow_wasm</code></a>) are available for the main rust library(<a href=https://github.com/mCaptcha/pow_sha256><code>mCaptcha/pow_sha256</code></a>).</p><p>For browsers without support WebAssembly, a
polyfill(<a href=https://github.com/mCaptcha/pow_sha256-polyfill><code>pow_sha256-polyfill</code></a>)
is available.</p><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/docs/API/browser.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p><div class="docs-navigation d-flex justify-content-between"><a href=/docs/help/troubleshooting/><div class="card my-1"><div class="card-body py-2">&larr; Troubleshooting</div></div></a><a class=ms-auto href=/docs/api/mcaptcha-system/><div class="card my-1"><div class="card-body py-2">mCaptcha System Library &rarr;</div></div></a></div></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<h1>pow_sha256</h1>
<p class="lead"></p>
<p>Rust crate which generates SHA256 Proofs of Work on serializable datatypes.</p>
<p>This is a fork of the <a href="https://github.com/bddap/pow"><code>pow</code> library</a> by
<a href="https://github.com/robkorn/pow_sha256">@robkorn</a>) with some new
additions. Primary of these being:</p>
<ul>
<li>PoW datatype now offers a constructor</li>
<li>Salt is no longer hard coded into the library, users can provide
unique salts.</li>
</ul>
<p>Other small changes have also been included of various importance but
mostly just stylistic/ease of use improvements.</p>
<h2 id="versions">Versions<a href="#versions" class="anchor" aria-hidden="true">#</a> </h2>
<ul>
<li><a href="https://mcaptcha.github.io/pow_sha256/pow_sha256/index.html">master-branch</a></li>
<li><a href="/api-docs/pow_sha256/0.2.1/pow_sha256/index.html">0.2.1</a></li>
<li><a href="/api-docs/pow_sha256/0.2.0/pow_sha256/index.html">0.2.0</a></li>
<li><a href="/api-docs/pow_sha256/0.1.0/pow_sha256/index.html">0.1.0</a></li>
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<a href=https://github.com/robkorn/pow_sha256>@robkorn</a>) with some new
additions. Primary of these being:</p><ul><li>PoW datatype now offers a constructor</li><li>Salt is no longer hard coded into the library, users can provide
unique salts.</li></ul><p>Other small changes have also been included of various importance but
mostly just stylistic/ease of use improvements.</p><h2 id=versions>Versions<a href=#versions class=anchor aria-hidden=true>#</a></h2><ul><li><a href=https://mcaptcha.github.io/pow_sha256/pow_sha256/index.html>master-branch</a></li><li><a href=/api-docs/pow_sha256/0.2.1/pow_sha256/index.html>0.2.1</a></li><li><a href=/api-docs/pow_sha256/0.2.0/pow_sha256/index.html>0.2.0</a></li><li><a href=/api-docs/pow_sha256/0.1.0/pow_sha256/index.html>0.1.0</a></li></ul><h2 id=changelog>Changelog<a href=#changelog class=anchor aria-hidden=true>#</a></h2><p>Changelog is available at the project&rsquo;s
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<h1>Troubleshooting</h1>
<p class="lead">Solutions to common problems.</p>
<h2 id="q-i-just-setup-an-instance-but-i-am-unable-to-login">Q: I just setup an instance but I am unable to login<a href="#q-i-just-setup-an-instance-but-i-am-unable-to-login" class="anchor" aria-hidden="true">#</a> </h2>
<p>mCaptcha by default is configured to server at <code>localhost</code> hostname. If
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the instance is deployed at another hostname, please try setting
<code>MCAPTCHA_SERVER_DOMAIN</code> environment variable to the hostname at which
your instance is deployed or setting the equivalent in config.toml:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-toml" data-lang="toml"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>[server]
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>domain=mydomain
</span></span></code></pre></div>
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<span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class="nav-item active"><a class=nav-link href=/docs/webmasters/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><div class="row justify-content-center"><div class="col-md-12 col-lg-10 col-xl-8"><article><h1 class=text-center>Self-Hosting</h1><div class=text-center></div><div class=card-list><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/self-hosting/dependencies/>Database and Cache &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/self-hosting/bare-metal/>Deploy Bare Metal &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/self-hosting/getting-started/>Getting Started &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/self-hosting/docker/>Using Docker &rarr;</a></div></div></div></article></div></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Self-Hosting on</title><link>/docs/self-hosting/</link><description>Recent content in Self-Hosting on</description><generator>Hugo -- gohugo.io</generator><language>en-US</language><atom:link href="/docs/self-hosting/index.xml" rel="self" type="application/rss+xml"/><item><title>Getting started</title><link>/docs/self-hosting/getting-started/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>/docs/self-hosting/getting-started/</guid><description>Get started There are two main ways to self-host mCaptcha:
Bare metal With Docker</description></item><item><title>Deploy bare metal</title><link>/docs/self-hosting/bare-metal/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>/docs/self-hosting/bare-metal/</guid><description>2. Configure mcaptcha is highly configurable.
Configuration is applied/merged in the following order:
path to configuration file passed in via MCAPTCHA_CONFIG ./config/default.toml /etc/mcaptcha/config.toml environment variables. 1. Install postgres if you don&amp;rsquo;t have it already. For Debian based distributions:
1sudo apt install postgres 2. Create new user for running mcaptcha 1$ sudo useradd -b /srv -m -s /usr/bin/zsh mcaptcha 3. Create new user in Postgres 1$ sudo -iu postgres # switch to `postgres` user 2$ psql 3postgres=# CREATE USER mcaptcha WITH PASSWORD &amp;#39;my super long password and yes you need single quote`; 4$ createdb -O mcaptcha mcaptcha # create db &amp;#39;mcaptcha&amp;#39; with &amp;#39;mcaptcha&amp;#39; as owner 4.</description>
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1sudo apt install postgres 2. Create new user for running mcaptcha 1$ sudo useradd -b /srv -m -s /usr/bin/zsh mcaptcha 3. Create new user in Postgres 1$ sudo -iu postgres # switch to `postgres` user 2$ psql 3postgres=# CREATE USER mcaptcha WITH PASSWORD &amp;#39;my super long password and yes you need single quote`; 4$ createdb -O mcaptcha mcaptcha # create db &amp;#39;mcaptcha&amp;#39; with &amp;#39;mcaptcha&amp;#39; as owner 4.</description></item><item><title>Using Docker</title><link>/docs/self-hosting/docker/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>/docs/self-hosting/docker/</guid><description>With Docker 1. Configure mcaptcha is highly configurable.
Configuration is applied/merged in the following order:
path to configuration file passed in via MCAPTCHA_CONFIG ./config/default.toml /etc/mcaptcha/config.toml environment variables. See CONFIGURATION.md for configurable options.
2. Run image If you have already have a Postgres instance running, then:
1docker run -p &amp;lt;host-machine-port&amp;gt;:&amp;lt;port-in-configuration-file&amp;gt; \ 2 --add-host=database:&amp;lt;database-ip-addrss&amp;gt; \ 3 -e RUST_LOG=debug \ 4 -e DATABASE_URL=&amp;#34;postgres://&amp;lt;db-user&amp;gt;:&amp;lt;db-password&amp;gt;@database:&amp;lt;db-port&amp;gt;/&amp;lt;db-name&amp;gt;&amp;#34; \ 5 mcaptcha/mcaptcha:latest If you don&amp;rsquo;t have a Postgres instance running, you can either install one using a package manager or launch one with docker.</description>
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When compiling from source, unset database configuration(comment out database configuration/ unset relevant environment variables). mCaptcha uses sqlx database client library which checks SQL queries at compile time. So if you are starting with a fresh database without migrations applied, compilation will fail.
Redis Redis is an optional dependency. Currently, the non-Redis configuration doesn&amp;rsquo;t persist CAPTCHA heat.</description>
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<h1>CLI tool</h1>
<p class="lead"></p>
<p>A CLI tool exists to compute mCaptcha challenges. It can be installed
from multiple sources:</p>
<h2 id="install">Install<a href="#install" class="anchor" aria-hidden="true">#</a> </h2>
<h3 id="cratesio">crates.io<a href="#cratesio" class="anchor" aria-hidden="true">#</a> </h3>
<p>The CLI tool is available on, <a href="https://crates.io">crates.io</a>, the Rust
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from multiple sources:</p><h2 id=install>Install<a href=#install class=anchor aria-hidden=true>#</a></h2><h3 id=cratesio>crates.io<a href=#cratesio class=anchor aria-hidden=true>#</a></h3><p>The CLI tool is available on, <a href=https://crates.io>crates.io</a>, the Rust
language&rsquo;s package registry. Rust language toolchain is required to
install from crates.io, please see <a href="https://rustup.rs">rustup.rs</a> for
Instructions to install it.</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>cargo install mcaptcha-cli
</span></span></code></pre></div><h3 id="pre-compiled-binaries">Pre-compiled binaries<a href="#pre-compiled-binaries" class="anchor" aria-hidden="true">#</a> </h3>
<p>Nightly builds and stable releases are regularly published to
<a href="https://dl.mcaptcha.org/mcaptcha/cli">dl.mcaptcha.org</a> for a variety of
CPU architectures and operating systems.</p>
<ol>
<li>Download binary, checksum and GPG signature files</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style="color:#ff79c6">{</span>VERSION<span style="color:#ff79c6">}</span>/<span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style="color:#ff79c6">{</span>VERSION<span style="color:#ff79c6">}</span>/<span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz.asc
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3</span><span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style="color:#ff79c6">{</span>VERSION<span style="color:#ff79c6">}</span>/<span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz.sha256
</span></span></code></pre></div><ol start="2">
<li>Verify checksum</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>sha256sum -c <span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz.sha256
</span></span></code></pre></div><ol start="3">
<li>Download mCaptcha&rsquo;s GPG release keys and verify GPG signature</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>gpg --keyserver keyserver.ubuntu.com --recv 73DAC973A9ADBB9ADCB5CDC4595A08135BA9FF73
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>gpg --verify <span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz.asc
</span></span></code></pre></div><ol start="4">
<li>Install Binary</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>tar -xvzf <span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>.tar.gz <span style="color:#ff79c6">&amp;&amp;</span> sudo cp <span style="color:#ff79c6">{</span>FILENAME<span style="color:#ff79c6">}</span>/mcaptcha-cli /usr/local/bin
</span></span></code></pre></div><h3 id="build-from-source">Build from source<a href="#build-from-source" class="anchor" aria-hidden="true">#</a> </h3>
<ol>
<li>Install Rust tool chain
Please see <a href="https://rustup.rs">here</a> for instructions.</li>
<li>Download source code</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>git clone https://git.batsense.net/mCaptcha/cli
</span></span></code></pre></div><ol start="3">
<li>Compile and install</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>cargo build --release <span style="color:#ff79c6">&amp;&amp;</span> sudp cp ./target/release/mcaptcha-cli
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>/usr/local/bin
</span></span></code></pre></div><h2 id="pass-mcaptcha-challenge">Pass mCaptcha challenge<a href="#pass-mcaptcha-challenge" class="anchor" aria-hidden="true">#</a> </h2>
<p>The CLI tool requires details about the challenge to work on it. The
tool can be used in three different modes compute challenge:</p>
<ol>
<li>Protected Page: Compute mCaptcha challenge for the CAPTCHA at a
protected page</li>
<li>Widget URL: Compute PoW for captcha at widget URL</li>
<li>(Developer mode) Offline: Computes PoW over given CAPTCHA parameters</li>
</ol>
<h3 id="from-protected-page-url">From protected page URL<a href="#from-protected-page-url" class="anchor" aria-hidden="true">#</a> </h3>
<p>The most convenient mode: copy the URL of the webpage which has the
install from crates.io, please see <a href=https://rustup.rs>rustup.rs</a> for
Instructions to install it.</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>cargo install mcaptcha-cli
</code></pre></div><h3 id=pre-compiled-binaries>Pre-compiled binaries<a href=#pre-compiled-binaries class=anchor aria-hidden=true>#</a></h3><p>Nightly builds and stable releases are regularly published to
<a href=https://dl.mcaptcha.org/mcaptcha/cli>dl.mcaptcha.org</a> for a variety of
CPU architectures and operating systems.</p><ol><li>Download binary, checksum and GPG signature files</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style=color:#ff79c6>{</span>VERSION<span style=color:#ff79c6>}</span>/<span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style=color:#ff79c6>{</span>VERSION<span style=color:#ff79c6>}</span>/<span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz.asc
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span>wget https://dl.mcaptcha.org/mcaptcha/cli/<span style=color:#ff79c6>{</span>VERSION<span style=color:#ff79c6>}</span>/<span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz.sha256
</code></pre></div><ol start=2><li>Verify checksum</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>sha256sum -c <span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz.sha256
</code></pre></div><ol start=3><li>Download mCaptcha&rsquo;s GPG release keys and verify GPG signature</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>gpg --keyserver keyserver.ubuntu.com --recv 73DAC973A9ADBB9ADCB5CDC4595A08135BA9FF73
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>gpg --verify <span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz.asc
</code></pre></div><ol start=4><li>Install Binary</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>tar -xvzf <span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>.tar.gz <span style=color:#ff79c6>&amp;&amp;</span> sudo cp <span style=color:#ff79c6>{</span>FILENAME<span style=color:#ff79c6>}</span>/mcaptcha-cli /usr/local/bin
</code></pre></div><h3 id=build-from-source>Build from source<a href=#build-from-source class=anchor aria-hidden=true>#</a></h3><ol><li>Install Rust tool chain
Please see <a href=https://rustup.rs>here</a> for instructions.</li><li>Download source code</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>git clone https://git.batsense.net/mCaptcha/cli
</code></pre></div><ol start=3><li>Compile and install</li></ol><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>cargo build --release <span style=color:#ff79c6>&amp;&amp;</span> sudp cp ./target/release/mcaptcha-cli
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>/usr/local/bin
</code></pre></div><h2 id=pass-mcaptcha-challenge>Pass mCaptcha challenge<a href=#pass-mcaptcha-challenge class=anchor aria-hidden=true>#</a></h2><p>The CLI tool requires details about the challenge to work on it. The
tool can be used in three different modes compute challenge:</p><ol><li>Protected Page: Compute mCaptcha challenge for the CAPTCHA at a
protected page</li><li>Widget URL: Compute PoW for captcha at widget URL</li><li>(Developer mode) Offline: Computes PoW over given CAPTCHA parameters</li></ol><h3 id=from-protected-page-url>From protected page URL<a href=#from-protected-page-url class=anchor aria-hidden=true>#</a></h3><p>The most convenient mode: copy the URL of the webpage which has the
mCaptcha widget (example: showcase.mcaptcha.org) and run the CLI tool
with it to get an authorization code:
Compute challenge using the URL</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>03:39 atm@lab cli ±|feat-parse-webpage ✗|→ mcaptcha-cli protected-page https://showcase.mcaptcha.org/
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>Authorization token: eRAZJiMrW58uDYA1s64Tmwq1u30HutuF
</span></span></code></pre></div><h3 id="widget-url">Widget URL<a href="#widget-url" class="anchor" aria-hidden="true">#</a> </h3>
<p>If you have the widget URL (will be in format https://mcaptcha.example.org/widget?sitekey=randomstring), it can be used to solve challenge as well:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>Compute PoW by fetching parameters from CAPTCHA URL
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3</span><span>Usage: mcaptcha-cli online --url &lt;URL&gt;
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">4</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">5</span><span>Options:
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">6</span><span> -u, --url &lt;URL&gt; URL of the CAPTCHA. Example: https://example.org/widget?sitekey<span style="color:#ff79c6">=</span>foo
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">7</span><span> -h, --help Print <span style="color:#8be9fd;font-style:italic">help</span>
</span></span></code></pre></div><p>Example usage:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>13:32 atm@lab cli ±|online ✗|→ mcaptcha-cli online -u https://demo.mcaptcha.org/widget?sitekey<span style="color:#ff79c6">=</span>pHy0AktWyOKuxZDzFfoaewncWecCHo23
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>Authorization token: 3xleN26OctBuVu3X4t6CYyUjErhaxQvz
</span></span></code></pre></div><h3 id="developer-mode-offline">[Developer mode] Offline<a href="#developer-mode-offline" class="anchor" aria-hidden="true">#</a> </h3>
<p>Useful while debugging mCaptcha configurations, works on raw challenge
parameters.</p>
<p>Help menu:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>Compute PoW with offline parameters
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3</span><span>Usage: mcaptcha-cli offline --salt &lt;SALT&gt; --phrase &lt;PHRASE&gt; --difficulty-factor &lt;DIFFICULTY_FACTOR&gt;
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">4</span><span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">5</span><span>Options:
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">6</span><span> -s, --salt &lt;SALT&gt; Salt with which PoW should be computed
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">7</span><span> -p, --phrase &lt;PHRASE&gt; Phrase over which PoW should be computed
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">8</span><span> -d, --difficulty-factor &lt;DIFFICULTY_FACTOR&gt; Difficulty Factor
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">9</span><span> -h, --help Print <span style="color:#8be9fd;font-style:italic">help</span>
</span></span></code></pre></div><p>Example usage:</p>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>13:28 atm@lab cli ±|online|→ mcaptcha-cli offline -s <span style="color:#ff79c6">$(</span>rand 32<span style="color:#ff79c6">)</span> -p <span style="color:#ff79c6">$(</span>rand 32<span style="color:#ff79c6">)</span> -d <span style="color:#bd93f9">50000</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2</span><span>difficulty: <span style="color:#bd93f9">50000</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3</span><span>nonce: <span style="color:#bd93f9">90507</span>
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">4</span><span>original phrase: f351f333d44b2c6b5bf7f033b065bbb8fb5e9dd153bd402e43ed04425f5a3859
</span></span><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">5</span><span>result: <span style="color:#bd93f9">340276562956196291522979356090220150471</span>
</span></span></code></pre></div><p>Where rand is <a href="https://github.com/realaravinth/dotfiles/blob/6fc6c87cc912e17488a35c0d3327ecf393221270/scripts/rand#L20">this</a> script.</p>
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Compute challenge using the URL</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>03:39 atm@lab cli ±|feat-parse-webpage ✗|→ mcaptcha-cli protected-page https://showcase.mcaptcha.org/
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>Authorization token: eRAZJiMrW58uDYA1s64Tmwq1u30HutuF
</code></pre></div><h3 id=widget-url>Widget URL<a href=#widget-url class=anchor aria-hidden=true>#</a></h3><p>If you have the widget URL (will be in format https://mcaptcha.example.org/widget?sitekey=randomstring), it can be used to solve challenge as well:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>Compute PoW by fetching parameters from CAPTCHA URL
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span>Usage: mcaptcha-cli online --url &lt;URL&gt;
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</span>Options:
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">6</span> -u, --url &lt;URL&gt; URL of the CAPTCHA. Example: https://example.org/widget?sitekey<span style=color:#ff79c6>=</span>foo
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">7</span> -h, --help Print <span style=color:#8be9fd;font-style:italic>help</span>
</code></pre></div><p>Example usage:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>13:32 atm@lab cli ±|online ✗|→ mcaptcha-cli online -u https://demo.mcaptcha.org/widget?sitekey<span style=color:#ff79c6>=</span>pHy0AktWyOKuxZDzFfoaewncWecCHo23
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>Authorization token: 3xleN26OctBuVu3X4t6CYyUjErhaxQvz
</code></pre></div><h3 id=developer-mode-offline>[Developer mode] Offline<a href=#developer-mode-offline class=anchor aria-hidden=true>#</a></h3><p>Useful while debugging mCaptcha configurations, works on raw challenge
parameters.</p><p>Help menu:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>Compute PoW with offline parameters
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span>Usage: mcaptcha-cli offline --salt &lt;SALT&gt; --phrase &lt;PHRASE&gt; --difficulty-factor &lt;DIFFICULTY_FACTOR&gt;
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</span>Options:
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">6</span> -s, --salt &lt;SALT&gt; Salt with which PoW should be computed
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">7</span> -p, --phrase &lt;PHRASE&gt; Phrase over which PoW should be computed
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">8</span> -d, --difficulty-factor &lt;DIFFICULTY_FACTOR&gt; Difficulty Factor
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">9</span> -h, --help Print <span style=color:#8be9fd;font-style:italic>help</span>
</code></pre></div><p>Example usage:</p><div class=highlight><pre style=color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>13:28 atm@lab cli ±|online|→ mcaptcha-cli offline -s <span style=color:#ff79c6>$(</span>rand 32<span style=color:#ff79c6>)</span> -p <span style=color:#ff79c6>$(</span>rand 32<span style=color:#ff79c6>)</span> -d <span style=color:#bd93f9>50000</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>difficulty: <span style=color:#bd93f9>50000</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span>nonce: <span style=color:#bd93f9>90507</span>
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</span>original phrase: f351f333d44b2c6b5bf7f033b065bbb8fb5e9dd153bd402e43ed04425f5a3859
<span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</span>result: <span style=color:#bd93f9>340276562956196291522979356090220150471</span>
</code></pre></div><p>Where rand is <a href=https://github.com/realaravinth/dotfiles/blob/6fc6c87cc912e17488a35c0d3327ecf393221270/scripts/rand#L20>this</a> script.</p><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/docs/user-manual/cli.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p><div class="docs-navigation d-flex justify-content-between"><a href=/docs/help/faq/><div class="card my-1"><div class="card-body py-2">&larr; FAQ</div></div></a><a class=ms-auto href=/docs/user-manual/how-to-mcaptcha-without-js/><div class="card my-1"><div class="card-body py-2">Use mCaptcha without JavaScript &rarr;</div></div></a></div></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<h1>Use mCaptcha without JavaScript</h1>
<p class="lead"></p>
<p>To use mCaptcha without JavaScript:</p>
<ol>
<li>Install mCaptcha CLI too. Please see <a href="./cli">here</a> for instructions.</li>
<li>Copy the URL of the protected page</li>
<li>Run mCaptcha CLI with that URL:</li>
</ol>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1</span><span>mcapthca-cli protected-page &lt;URL&gt;
</span></span></code></pre></div><ol start="4">
<li>Copy authorization code and paste it in the form</li>
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<h1>Configuring Difficulty Factor</h1>
<p class="lead"></p>
<p>mCaptcha is highly responsive to detecting DDoS attacks. Admins are
advised to take advantage of it by setting low <a href="/docs/terminology/difficulty-factor/">difficulty
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advised to take advantage of it by setting low <a href=/docs/terminology/difficulty-factor/>difficulty
factors</a> for normal traffic levels
for their website.</p>
<p><strong>Lowest advisable difficulty factor is 5000.</strong></p>
<p>For instance, if it is normal for my website to get 2000 requests for
every 30 seconds, I will set a <a href="/docs/terminology/cooldown-period">cool
for their website.</p><p><strong>Lowest advisable difficulty factor is 5000.</strong></p><p>For instance, if it is normal for my website to get 2000 requests for
every 30 seconds, I will set a <a href=/docs/terminology/cooldown-period>cool
down</a> period of 30 seconds and the
first level of difficulty configuration will have a <a href="/docs/terminology/visitor-threshold">visitor threshold</a> of 2000 with a
difficulty factor of 5000.</p>
<p>There are two modes to setting difficulty factor for your website on
mCaptcha:</p>
<h3 id="easy-option">Easy option<a href="#easy-option" class="anchor" aria-hidden="true">#</a> </h3>
<p>Easy mode asks a few basic statistics about your website and generates a
first level of difficulty configuration will have a <a href=/docs/terminology/visitor-threshold>visitor threshold</a> of 2000 with a
difficulty factor of 5000.</p><p>There are two modes to setting difficulty factor for your website on
mCaptcha:</p><h3 id=easy-option>Easy option<a href=#easy-option class=anchor aria-hidden=true>#</a></h3><p>Easy mode asks a few basic statistics about your website and generates a
configuration that should work for your website. Currently, easy mode is
guided by assumptions on suitable difficulty factors to protect a
website but it will be fine-tuned as mCaptcha sees more deployment.</p>
<p>Configuration generated by easy mode can be tweaked later using the
advance mode, as you become more familiar with how mCaptcha works.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_20x0_resize_box_3.png" data-srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_900x0_resize_box_3.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_800x0_resize_box_3.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_700x0_resize_box_3.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_600x0_resize_box_3.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_500x0_resize_box_3.png 500w" width="720" height="452" alt="new sitekey form in easy mode">
<noscript><img class="img-fluid" sizes="100vw" srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_900x0_resize_box_3.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_800x0_resize_box_3.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_700x0_resize_box_3.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_600x0_resize_box_3.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_500x0_resize_box_3.png 500w" src="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode.png" width="720" height="452" alt="new sitekey form in easy mode"></noscript>
</figure>
<h3 id="advance-option">Advance option<a href="#advance-option" class="anchor" aria-hidden="true">#</a> </h3>
<p>Advance mode gives the admin granular control over how mCaptcha behaves
website but it will be fine-tuned as mCaptcha sees more deployment.</p><p>Configuration generated by easy mode can be tweaked later using the
advance mode, as you become more familiar with how mCaptcha works.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_20x0_resize_box_2.png data-srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_900x0_resize_box_2.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_800x0_resize_box_2.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_700x0_resize_box_2.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_600x0_resize_box_2.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_500x0_resize_box_2.png 500w" width=720 height=452 alt="new sitekey form in easy mode"><noscript><img class=img-fluid sizes=100vw srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_900x0_resize_box_2.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_800x0_resize_box_2.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_700x0_resize_box_2.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_600x0_resize_box_2.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode_hu3f66189ea53484ac6603a2d78fa015c8_26636_500x0_resize_box_2.png 500w" src=/docs/webmasters/configuring-difficulty-factor/new-sitekey-easy-mode.png width=720 height=452 alt="new sitekey form in easy mode"></noscript></figure><h3 id=advance-option>Advance option<a href=#advance-option class=anchor aria-hidden=true>#</a></h3><p>Advance mode gives the admin granular control over how mCaptcha behaves
on their website. It has options to set the difficulty factor for each
level of traffic(or visitor threshold, in mCaptcha speak), fully taking
advantage of mCaptcha&rsquo;s variable difficulty factor feature.</p>
<p>For instance, if it is normal for a website to get 200 requests over 30
advantage of mCaptcha&rsquo;s variable difficulty factor feature.</p><p>For instance, if it is normal for a website to get 200 requests over 30
seconds, then setting a very low difficulty factor for a visitor
threshold of 200 and a cool down period of 30 seconds will allow the
users to pass through without waiting on the CAPTCHA. But if 1000
requests over 30 seconds will bring down the service, then the admin can
configure increasing levels of difficulty factor of increasing traffic
levels, effectively rate limiting its users and protecting the
underlying website.</p>
<figure>
<img class="img-fluid lazyload blur-up" data-sizes="auto" src="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_20x0_resize_box_3.png" data-srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_900x0_resize_box_3.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_800x0_resize_box_3.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_700x0_resize_box_3.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_600x0_resize_box_3.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_500x0_resize_box_3.png 500w" width="720" height="407" alt="new sitekey form in advance mode">
<noscript><img class="img-fluid" sizes="100vw" srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_900x0_resize_box_3.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_800x0_resize_box_3.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_700x0_resize_box_3.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_600x0_resize_box_3.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_500x0_resize_box_3.png 500w" src="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode.png" width="720" height="407" alt="new sitekey form in advance mode"></noscript>
</figure>
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underlying website.</p><figure><img class="img-fluid lazyload blur-up" data-sizes=auto src=/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_20x0_resize_box_2.png data-srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_900x0_resize_box_2.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_800x0_resize_box_2.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_700x0_resize_box_2.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_600x0_resize_box_2.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_500x0_resize_box_2.png 500w" width=720 height=407 alt="new sitekey form in advance mode"><noscript><img class=img-fluid sizes=100vw srcset="/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_900x0_resize_box_2.png 900w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_800x0_resize_box_2.png 800w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_700x0_resize_box_2.png 700w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_600x0_resize_box_2.png 600w,/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode_huc4867c6295dc4be195d832a52b37239b_23312_500x0_resize_box_2.png 500w" src=/docs/webmasters/configuring-difficulty-factor/new-sitekey-adv-mode.png width=720 height=407 alt="new sitekey form in advance mode"></noscript></figure><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/docs/webmasters/configuring-difficulty-factor/index.md><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-edit-2"><path d="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on git.batsense.net</a></p><div class="docs-navigation d-flex justify-content-between"><a href=/docs/webmasters/installing-captcha/><div class="card my-1"><div class="card-body py-2">&larr; Installing mCaptcha on your website</div></div></a><a class=ms-auto href=/docs/self-hosting/getting-started/><div class="card my-1"><div class="card-body py-2">Getting started &rarr;</div></div></a></div></main></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<label class="menu-icon d-md-none" for=menu-btn><span class=navicon></span></label><a class="navbar-brand order-1 order-md-0 me-auto" href=/>mCaptcha</a>
<button id=mode class="btn btn-link order-2 order-md-4" type=button aria-label="Toggle mode">
<span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class="nav-item active"><a class=nav-link href=/docs/webmasters/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><div class="row justify-content-center"><div class="col-md-12 col-lg-10 col-xl-8"><article><h1 class=text-center>Webmasters</h1><div class=text-center></div><div class=card-list><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/webmasters/configuring-difficulty-factor/>Configuring Difficulty Factor &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/webmasters/installing-captcha/>Installing MCaptcha on Your Website &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/webmasters/terminology/>Terminology &rarr;</a></div></div><div class="card my-3"><div class=card-body><a class=stretched-link href=/docs/webmasters/faq/>Webmasters FAQ &rarr;</a></div></div></div></article></div></div></div></div><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.80cc62918990f0b9afd15b81ea43df0bc0090a2419660eb4a32b4d122db3bdd007faabd824064bd5d275cbeb3d1e2d2bd650220c94c2ef3aeffb4dc2ef6551f5.js integrity="sha512-gMxikYmQ8Lmv0VuB6kPfC8AJCiQZZg60oytNEi2zvdAH+qvYJAZL1dJ1y+s9Hi0r1lAiDJTC7zrv+03C72VR9Q==" crossorigin=anonymous defer></script></body></html>

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<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<title>Webmasters on </title>
<link>/docs/webmasters/</link>
<description>Recent content in Webmasters on </description>
<generator>Hugo -- gohugo.io</generator>
<language>en-US</language>
<lastBuildDate>Tue, 06 Oct 2020 08:48:45 +0000</lastBuildDate><atom:link href="/docs/webmasters/index.xml" rel="self" type="application/rss+xml" />
<item>
<title>Installing mCaptcha on your website</title>
<link>/docs/webmasters/installing-captcha/</link>
<pubDate>Wed, 22 Jun 2022 00:00:00 +0000</pubDate>
<guid>/docs/webmasters/installing-captcha/</guid>
<description>mCaptcha can protect your website from DDoS attacks. In this guide we&amp;rsquo;ll explore how to install mCaptcha on your website. The end result will be something like this, on your website:
<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Webmasters on</title><link>/docs/webmasters/</link><description>Recent content in Webmasters on</description><generator>Hugo -- gohugo.io</generator><language>en-US</language><lastBuildDate>Tue, 06 Oct 2020 08:48:45 +0000</lastBuildDate><atom:link href="/docs/webmasters/index.xml" rel="self" type="application/rss+xml"/><item><title>Installing mCaptcha on your website</title><link>/docs/webmasters/installing-captcha/</link><pubDate>Wed, 22 Jun 2022 00:00:00 +0000</pubDate><guid>/docs/webmasters/installing-captcha/</guid><description>mCaptcha can protect your website from DDoS attacks. In this guide we&amp;rsquo;ll explore how to install mCaptcha on your website. The end result will be something like this, on your website:
For the purpose of this demo, we will be using demo.mcaptcha.org, a demo instance running in @realaravinth&amp;rsquo;s bedroom(for this same reason, it shouldn&amp;rsquo;t be used for anything serious)
1. Create an account and sign into the mCaptcha dashboard Head over to demo.</description>
</item>
<item>
<title>Configuring Difficulty Factor</title>
<link>/docs/webmasters/configuring-difficulty-factor/</link>
<pubDate>Wed, 22 Jun 2022 00:00:00 +0000</pubDate>
<guid>/docs/webmasters/configuring-difficulty-factor/</guid>
<description>mCaptcha is highly responsive to detecting DDoS attacks. Admins are advised to take advantage of it by setting low difficulty factors for normal traffic levels for their website.
1. Create an account and sign into the mCaptcha dashboard Head over to demo.</description></item><item><title>Configuring Difficulty Factor</title><link>/docs/webmasters/configuring-difficulty-factor/</link><pubDate>Wed, 22 Jun 2022 00:00:00 +0000</pubDate><guid>/docs/webmasters/configuring-difficulty-factor/</guid><description>mCaptcha is highly responsive to detecting DDoS attacks. Admins are advised to take advantage of it by setting low difficulty factors for normal traffic levels for their website.
Lowest advisable difficulty factor is 5000.
For instance, if it is normal for my website to get 2000 requests for every 30 seconds, I will set a cool down period of 30 seconds and the first level of difficulty configuration will have a visitor threshold of 2000 with a difficulty factor of 5000.</description>
</item>
<item>
<title>Terminology</title>
<link>/docs/webmasters/terminology/</link>
<pubDate>Wed, 27 Jul 2022 08:48:45 +0000</pubDate>
<guid>/docs/webmasters/terminology/</guid>
<description>Authorization token When a visitor solves the CAPTCHA and sends their solution to an mCaptcha instance, the solution will be verified for correctness. If the solution is correct, mCaptcha will return a single use authorization token.
This authorization token should be attached to the visitor&amp;rsquo;s requited to the protected service and the protected service should validity of the authorization token with the mCaptcha instance and only allow authorization to protected resource if the authorization token is valid.</description>
</item>
<item>
<title>Webmasters FAQ</title>
<link>/docs/webmasters/faq/</link>
<pubDate>Wed, 27 Jul 2022 08:48:45 +0000</pubDate>
<guid>/docs/webmasters/faq/</guid>
<description>Easy Mode: Default cooldown period When configuring mCaptcha in easy mode, the default cooldown period is set to 30 seconds.
How to get site key from dashboard? Go to &amp;ldquo;Site keys&amp;rdquo; on the side panel in the dashboard click on the clipboard button to copy the site key to your clipboard. </description>
</item>
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</rss>
For instance, if it is normal for my website to get 2000 requests for every 30 seconds, I will set a cool down period of 30 seconds and the first level of difficulty configuration will have a visitor threshold of 2000 with a difficulty factor of 5000.</description></item><item><title>Terminology</title><link>/docs/webmasters/terminology/</link><pubDate>Wed, 27 Jul 2022 08:48:45 +0000</pubDate><guid>/docs/webmasters/terminology/</guid><description>Authorization token When a visitor solves the CAPTCHA and sends their solution to an mCaptcha instance, the solution will be verified for correctness. If the solution is correct, mCaptcha will return a single use authorization token.
This authorization token should be attached to the visitor&amp;rsquo;s requited to the protected service and the protected service should validity of the authorization token with the mCaptcha instance and only allow authorization to protected resource if the authorization token is valid.</description></item><item><title>Webmasters FAQ</title><link>/docs/webmasters/faq/</link><pubDate>Wed, 27 Jul 2022 08:48:45 +0000</pubDate><guid>/docs/webmasters/faq/</guid><description>Easy Mode: Default cooldown period When configuring mCaptcha in easy mode, the default cooldown period is set to 30 seconds.
How to get site key from dashboard? Go to &amp;ldquo;Site keys&amp;rdquo; on the side panel in the dashboard click on the clipboard button to copy the site key to your clipboard.</description></item></channel></rss>

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