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Aravinth Manivannan 2023-10-30 18:08:03 +05:30
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<!doctype 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>
<html lang="en-US"> <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>
<head> <button id=mode class="btn btn-link order-2 order-md-4" type=button aria-label="Toggle mode">
<meta charset="utf-8"> <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>
<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>
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<meta name="twitter:site" content="@">
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<meta property="og:type" content="website">
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<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": "\/"
},{
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"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>
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</button>
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<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>
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</article>
</div>
</div>
</div>
</div>
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<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>
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</footer>
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about/index.html
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<!doctype 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="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>
<html lang="en-US"> <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>
<head> <button id=mode class="btn btn-link order-2 order-md-4" type=button aria-label="Toggle mode">
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<h1>About</h1>
<p class="lead"></p>
<p>mCaptcha is a kickass CAPTCHA systems that gives (DDoS)
attackers a run for their money. And we do all of this without tracking 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> 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
<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 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 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 the user to pick cars or ID sidewalks — our system does it’s
thing(usually at the click of a button) and gets out of the way.</p> thing(usually at the click of a button) and gets out of the way.</p><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
<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
knowledge with others. If everything was labeled intellectual property, knowledge with others. If everything was labeled intellectual property,
we might still be stuck in Stone Age. The idea of 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 is alien to us. For this reason, all of our source code is freely
available(both as in freedom and beers) at our <a href="https://github.com/mCaptcha">GitHub</a>.</p> 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>
<h2 id="people">People<a href="#people" class="anchor" aria-hidden="true">#</a> </h2> Author</p></li><li><p><strong><a href=https://sibichakkaravarthy.github.io/>Prof. Sibi Chakkaravarthy
<ul>
<li>
<p><strong><a href="https://batsense.net">Aravinth Mavniannan</a>:</strong>
Author</p>
</li>
<li>
<p><strong><a href="https://sibichakkaravarthy.github.io/">Prof. Sibi Chakkaravarthy
Sethuraman</a>:</strong> Mentor and Sethuraman</a>:</strong> Mentor and
Security Advisor</p> Security Advisor</p></li></ul><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/about/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>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>
</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 first edition of the monthly report!</p>
<p>I believe free software like mCaptcha is critical to a healthy internet
but being a one-person show, there&rsquo;s hardly any accountability in the 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 way software is built. I hope, through monthly reports, I can explain
the logic and intentions behind decisions taken in the development the logic and intentions behind decisions taken in the development
process.</p> 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
<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
algorithm used in mCaptcha. This meanth browsers without WASM support 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, couldn&rsquo;t process CAPTCHAs. This month, <a href=https://github.com/mCaptcha/pow_sha256-polyfill>a pure JavaScript(TypeScript,
technically) implementation technically) implementation</a> was released to
</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,
overcome this limitation.</p> integration libraries for <a href=https://www.npmjs.com/package/@mcaptcha/vanilla-glue>Vanilla
<h2 id="3-integration-libraries-for-vanilla-js-react-and-svelte">3. Integration libraries for Vanilla JS, React and Svelte:</h2> JS</a>, <a href=https://www.npmjs.com/package/@mcaptcha/react-glue>React
<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 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 similar APIs very similar to that of Google&rsquo;s reCAPTCHA and Cloudflare&rsquo;s
hCaptcha.</p> 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
<ul> 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
<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 configuration from familiar metrics like average, peak and traffic that
took the user&rsquo;s website down.</p> 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
<figure> 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>
<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">
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&larr; May, 2022: Monthly Report
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Survey &rarr;
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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
on mCaptcha in 2023, we suffered an outage from 15 January to February on mCaptcha in 2023, we suffered an outage from 15 January to February
6, polyfill benchmarking support in mCaptcha</em></p> 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
<h2 id="we-have-funding">We have funding!</h2> 2023 development is funded through the <a href=https://nlnet.nl/entrust>NGI0
<p><a href="https://gusted.xyz">Gusted</a> and I applied and secured funding through 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
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 available
<a href="https://git.batsense.net/mCaptcha/2023-NLnet/projects/6">here</a>.</p> <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,
<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 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 problems, the fan on that server was failing and we couldn&rsquo;t get spares
sooner.</p> 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
<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, restore all mCaptcha infrastructure, so that in the even of an outage,
we could restore our infrastructure in much shorter duration.</p> 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
<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 statistics on how mCaptcha performs on various browsers and devices. So
far, we&rsquo;ve only been running benchmarks with the WebAssembly 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 with the JavaScript polyfill implementation on browsers without
WebAssembly support.</p> WebAssembly support.</p></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/introducing-mcaptcha-net/><div class="card my-1"><div class="card-body py-2">&larr; Introducing mCaptcha net</div></div></a><a class=ms-auto href=/blog/july-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">July, 2022: Monthly Report &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/02-23-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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<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 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. 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> 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!
</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. 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> 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!
</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! 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! 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> 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!
</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! 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> 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!
</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. 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: This month, the following things were accomplished:
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description> 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
</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. 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> 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.
</item> 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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<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>
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<meta http-equiv="x-ua-compatible" content="ie=edge"> Denial-of-Service protection, because of <a href=https://www.w3.org/TR/turingtest/#proof-of-work>its excellent accessibility
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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
characteristics</a>. PoW characteristics</a>. PoW
within mCaptcha is configuration &mdash; webmasters can configure 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 installations, which determines waiting time for visitors. But PoW can
become inaccessible if webmasters choose a very high difficulty factor. become inaccessible if webmasters choose a very high difficulty factor.
So they have to maintain a balance which imposes sufficient load on DDoS So they have to maintain a balance which imposes sufficient load on DDoS
attackers while also being accessible to common folk.</p> 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
<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 building a feedback loop which would gather performance statistics from
voluntary mCaptcha installations and make them available to other voluntary mCaptcha installations and make them available to other
mCaptcha installations. The performance statistics can be used by all mCaptcha installations. The performance statistics can be used by all
mCaptcha instances to automatically optimize an installation. We are mCaptcha instances to automatically optimize an installation. We are
calling this the mCaptcha net.</p> 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
<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 optional as it has privacy implications: it will reveal the
existence of an mCaptcha instance.</p> existence of an mCaptcha instance.</p><p>The admins of mCaptcha instances can choose to upload truly anonymous
<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.
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 The data uploaded is public and so is accessible to all mCaptcha
instances.</p> 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>,
<p>We also offer opt-in controls at installation level:</p> <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>,
<figure> <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>
<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."> </code></pre></div><p>This doesn&rsquo;t include the usual fingerprinting parameters like
<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
User-Agent, cookies, and IP address. Additionally, we use pseudo IDs User-Agent, cookies, and IP address. Additionally, we use pseudo IDs
at both mCaptcha/mCaptcha and mCaptcha/survey to avoid exposing installations.</p> 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
<figure> working. Pull request <a href=https://github.com/mCaptcha/mCaptcha/pull/92>mCaptcha/mCaptcha#92</a>
<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>
added abilities to mCaptcha to upload statistics to mCaptcha/survey instances and 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 self-tuning algorithm within mCaptcha to use this data and optimize
installations automatically.</p> installations automatically.</p></article><div class="docs-navigation d-flex justify-content-between"><a class=ms-auto href=/blog/february-2023-monthly-report/><div class="card my-1"><div class="card-body py-2">February, 2023: Monthly Report &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/10-20-mcaptcha-net/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>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,
mCaptcha supports MariaDB, I&rsquo;ve applied for NLnet and Open Tech Fund, mCaptcha supports MariaDB, I&rsquo;ve applied for NLnet and Open Tech Fund,
documentation is updated: tutorials and glossary is added and glue libraries documentation is updated: tutorials and glossary is added and glue libraries
have new releases.</em></p> 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
<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 accessible: they currently use a text-based CAPTCHA, which will be
replaced by mCaptcha. The decision was finalized after I presented replaced by mCaptcha. The decision was finalized after I presented
mCaptcha to them at a meeting their organized. Please see mCaptcha to them at a meeting their organized. Please see
<a href="https://batsense.net/talks/codeberg-introducing-mcaptcha/">here</a> for <a href=https://batsense.net/talks/codeberg-introducing-mcaptcha/>here</a> for
slides.</p> 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
<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 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 <a href=https://github.com/go-gitea/gitea/pull/20458>here</a> for related the
pull request.</p> pull request.</p><p>This project is yet to see usage, so we are venturing into uncharted
<p>This project is yet to see usage, so we are venturing into uncharted
territory: should you face issues with either deploying or territory: should you face issues with either deploying or
integrating mCaptcha, please feel free <a href="/community">to reach out</a>.</p> 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
<h2 id="mcaptcha-supports-mariadb">mCaptcha supports MariaDB:</h2> support for MariaDB. <a href=https://mcaptcha.org/blog/may-2022-monthly-report#refactor>The work done in
<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 May, 2022</a> made
implementing support easy. Support for MariaDB is first class in implementing support easy. Support for MariaDB is first class in
mCaptcha: automatic testing exist to run tests with both Postgres and mCaptcha: automatic testing exist to run tests with both Postgres and
MariaDB, so I expect things to be stable.</p> 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
<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 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 and
<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>
respectively.</p> 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
<p>If funding is granted:</p> cleaned up some of the mess and added <a href=/docs/introduction/installing-captcha/>a
<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 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 glossary</a>, which contain explanations
to mCaptcha jargon.</p> to mCaptcha jargon.</p><h2 id=new-releases-glue-libraries>New releases: glue libraries</h2><p><code>0.1.0-alpha-2</code> for
<h2 id="new-releases-glue-libraries">New releases: glue libraries</h2> <a href=https://www.npmjs.com/package/@mcaptcha/vanilla-glue>vanilla</a>,
<p><code>0.1.0-alpha-2</code> for <a href=https://www.npmjs.com/package/@mcaptcha/react-glue>react</a> and
<a href="https://www.npmjs.com/package/@mcaptcha/vanilla-glue">vanilla</a>, <a href=https://www.npmjs.com/package/@mcaptcha/svelte-glue>svelte</a> glue
<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 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> 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
<h2 id="footnotes">Footnotes</h2> <a href=https://mastodon.social/@humanetech>@humantech</a> for his thoughtful
<ul> reviews and to <a href=https://dachary.org>@dachary</a> for pointing me towards
<li>[0]: Special thanks to 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>
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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 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
progress: I had been trying to do it since summer 2021, but I faced 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 various setbacks along the way. A family friend, who is also an auditor
helped me finally get mCaptcha incorporated!</p> 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
<p>And we&rsquo;ve already filed successfully filed the first tax return too!</p> </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
<h3 id="gstin">GSTIN</h3> probably). For <a href=https://hostea.org>Hostea</a>, I wrote a dashboard with
<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
payments capabilities(via Stripe) so that experience will help me do the 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 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 probably the first effort to offer a fully libre, infrastructure-as-code
and payments software included, hosting service. I would like to do the 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 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 wants to offer mCaptcha hosted services, they can replicate my set up
with ease.</p> with ease.</p><p>But the commercial offering will at no point force me or future
<p>But the commercial offering will at no point force me or future
maintainers turn mCaptcha into adopting a non-free license like the 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>. License</a>.
So the following months will see administrative changes within mCaptcha So the following months will see administrative changes within mCaptcha
to device mechanisms to prevent me or any future party with influence in to device mechanisms to prevent me or any future party with influence in
mCaptcha development from hurting the project by it non-free.</p> mCaptcha development from hurting the project by it non-free.</p><p>Hostea is also an experiment in Free Software commercial operations, so
<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 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 there. mCaptcha, too, will borrow ideas from that project to make its
development economically sustainable.</p> development economically sustainable.</p></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/july-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">&larr; July, 2022: Monthly Report</div></div></a><a class=ms-auto href=/blog/may-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">May, 2022: Monthly Report &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/06-22-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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<li><a href="#python-bindings-to-mcaptcha-powhttpsgithubcommcaptchapow_sha256">Python bindings to <a href="https://github.com/mCaptcha/pow_sha256/">mCaptcha PoW</a></a></li>
<li><a href="#measuring-ddos-protection-effectiveness">Measuring DDoS protection effectiveness</a></li>
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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:
no commits on the repositories and no monthly updates. But the project no commits on the repositories and no monthly updates. But the project
is far from dead!</p> 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
<h2 id="python-bindings-to-mcaptcha-powhttpsgithubcommcaptchapow_sha256">Python bindings to <a href="https://github.com/mCaptcha/pow_sha256/">mCaptcha PoW</a></h2> <a href=https://github.com/mCaptcha/pow_sha256>pow_sha256</a>, the
<p><a href="https://github.com/mCaptcha/pow_py">pow_py</a> contains bindings to <a href=https://en.wikipedia.org/wiki/Proof_of_work>proof-of-work</a> library
<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 that mCaptcha uses. For the uninitiated, the bindings allow for python
programs to automatically solve mCaptcha.</p> programs to automatically solve mCaptcha.</p><p>So if you are writing a script to do some chore on your favourite
<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 website that is protected by mCaptcha, you can now solve the mCaptcha
automatically from within the program.</p> 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
<p>Here&rsquo;s an example:</p> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 2</span>
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 3</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"> 2</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 4</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"> 3</span><span><span style="color:#ff79c6">import</span> mcaptcha_pow_py <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f"> 5</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><span style="color:#ff79c6">import</span> requests <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></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 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></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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">10</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">11</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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">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">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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">16</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">17</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">16</span><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></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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">21</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">20</span><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">22</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">21</span><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></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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">26</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">27</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">26</span><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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">29</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">30</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">29</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">31</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">30</span><span> <span style="color:#6272a4"># verify PoW</span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">32</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">31</span><span> proof <span style="color:#ff79c6">=</span> { <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></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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">36</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">35</span><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">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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">39</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">38</span><span> resp <span style="color:#ff79c6">=</span> resp<span style="color:#ff79c6">.</span>json() <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">40</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">39</span><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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">42</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">43</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">42</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">44</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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">45</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">44</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">46</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">45</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">47</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">46</span><span>token <span style="color:#ff79c6">=</span> solve_captcha() <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></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 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></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 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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">51</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">50</span><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">52</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 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)
</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>} </code></pre></div><p>This could be missed for building DDoS bots(more on that
</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) <a href=#measuring-ddos-protection-effectiveness>here</a>) but this could also be
</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
used to make CAPTCHA solving automated within screen readers and other used to make CAPTCHA solving automated within screen readers and other
accessibility devices!</p> 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
<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 limiting but how much attack can it, specifically mCaptcha&rsquo;s
implementation, withstand when compared to an unprotected endpoint? To implementation, withstand when compared to an unprotected endpoint? To
find out, we used the recently created Python bindings to the mCaptcha find out, we used the recently created Python bindings to the mCaptcha
PoW library, the excellent load testing tool, PoW library, the excellent load testing tool,
<a href="https://locust.io">locust</a> and wrote <a href=https://locust.io>locust</a> and wrote
<a href="https://github.com/mCaptcha/dos">mCaptcha/dos</a>!</p> <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
<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 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> server</a>
instance.</p> instance.</p><p>The initial topology consisted of one mCaptcha instance, one DDoS demo
<p>The initial topology consisted of one mCaptcha instance, one DDoS demo
server, one locust node running in leader configuration and six locust server, one locust node running in leader configuration and six locust
nodes running in follower configuration. I was authorised to use the nodes running in follower configuration. I was authorised to use the
netsec lab for three days, which unfortunately wasn&rsquo;t enough to go 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 Sethuraman</a> has kindly offered to
arrange authorisation to use the netsec lab once again in July 2022, arrange authorisation to use the netsec lab once again in July 2022,
during which I hope to finish running the experiment</p> during which I hope to finish running the experiment</p><p>Special thanks to <a href=http://ackr8.com/>ackr-8</a> and
<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
<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
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 cleaned up all database-related stuff for higher flexibility
and generally good architecture. This refactor lays the foundation and generally good architecture. This refactor lays the foundation
for implementing support for alternate database software for implementing support for alternate database software
programs(we currently support PostgreSQL only).</p> 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
<h2 id="mcaptcha-is-now-on-the-fediverse">mCaptcha is now on the Fediverse</h2> <a href=https://docs.gotosocial.org/>GoToSocial</a> instance run by
<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 @realaravinth. We&rsquo;ll soon be deleting our Twitter account in favour of
the Fediverse account.</p> the Fediverse account.</p><p><strong>Fediverse account:</strong>
<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>
<a href="https://gts.batsense.net/@mcaptcha">@mCaptcha@batsense.net</a></p> and <a href=https://hostea.org>Hostea</a> &mdash; both of which are <a href=https://en.wikipedia.org/wiki/Forge_(software)>software
<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 forge</a> related and so
when usable, will mostly improve the Free Software ecosystem. Hostea is when usable, will mostly improve the Free Software ecosystem. Hostea is
a project that aims to create a libre software development ecosystem and 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 horizontal community</a>, which allows for multiple service providers who
adhere to the Hostea policies to operate adhere to the Hostea policies to operate
under the Hostea umbrella &mdash; essentially allowing for the creation of under the Hostea umbrella &mdash; essentially allowing for the creation of
smaller, highly localised cooperatives.</p> smaller, highly localised cooperatives.</p><p>Cooperatives are interesting, and we believe that mCaptcha, too, can
<p>Cooperatives are interesting, and we believe that mCaptcha, too, can
benefit from such an architecture as it will prevent any one party from benefit from such an architecture as it will prevent any one party from
single-handedly sabotaging the project. The experience gained from single-handedly sabotaging the project. The experience gained from
Hostea will be reused in providing managed hosting for mCaptcha.</p> Hostea will be reused in providing managed hosting for mCaptcha.</p><p>By the end of this year, mCaptcha will reorganise into a horizontal
<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
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
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 now, so if someone is interested to help out do reach out and so that
we could do it sooner!</p> we could do it sooner!</p></blockquote><p>In context of mCaptcha, radical transparency will include all decisions
</blockquote>
<p>In context of mCaptcha, radical transparency will include all decisions
publicly made, funding and expenses publicly documented, and all publicly made, funding and expenses publicly documented, and all
collaborations, too, publicly documented. This of course doesn&rsquo;t imply collaborations, too, publicly documented. This of course doesn&rsquo;t imply
that private, personally identifiable information(addresses and phone that private, personally identifiable information(addresses and phone
numbers, for instance) will be publicly disclosed. Such information will numbers, for instance) will be publicly disclosed. Such information will
be redacted and published.</p> be redacted and published.</p></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/june-2022-monthly-report/><div class="card my-1"><div class="card-body py-2">&larr; June, 2022: Monthly Report</div></div></a><a class=ms-auto href=/blog/december-2021-monthly-report/><div class="card my-1"><div class="card-body py-2">December, 2021: Monthly Report &rarr;</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/05-22-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>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
to rate limit users or potential bots. In order for this to be to rate limit users or potential bots. In order for this to be
effective, the PoW should be configured properly. The difficulty effective, the PoW should be configured properly. The difficulty
requirement can&rsquo;t be too high, as it could cause accessibility issues on 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 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> wouldn&rsquo;t offer proper protection against bots.</p><p>Malicious bots(the ones that wreak havoc), run native code which is
<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 capable of running in a multi-threaded context. This creates an unfair
advantage for crackers using these bots over legitimate users, who advantage for crackers using these bots over legitimate users, who
usually use browsers to access a website.</p> usually use browsers to access a website.</p><p>I wanted to see how much of an advantage a native program would have
<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
over our WASM library.</p> 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
<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 extensions while the Chromium instance is clean, as I don&rsquo;t use it
much</p> 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
</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 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> to run to completion in under 5 seconds is impressive!</p><p>So, in my opinion, native implementation is only slightly faster than
<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 the WASM library and for all intents and purposes, this shouldn&rsquo;t matter
much.</p> much.</p><hr><p>P.S Work is underway to benchmark multiple platforms. A detailed report
<hr> 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
<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 computers. The results slightly varied but even the slowest case
generated proof for 4500000 difficulty(the highest in this test), in under generated proof for 4500000 difficulty(the highest in this test), in under
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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>
<li><a href="#why-use-mcaptcha">Why use mCaptcha?</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
CAPTCHA system that doesn&rsquo;t track. Seriously, no tracking. But that 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 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 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> 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
<h2 id="how-does-it-work">How does it work?</h2> 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
<p>mCaptcha uses SHA256 based proof-of-work(PoW) to rate limit users.</p> 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
<p>When a user wants to do something on an mCaptcha-protected website,</p> request/form to the destination website.</p></li><li><p>The destination website validates the submitted token with
<ol> mCaptcha before processing the request.</p></li></ol><p>The whole process is automated from the user&rsquo;s point of view. All they
<li> 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
<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 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 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 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 more work to send requests than your server you will have to do to respond
to their request.</p> 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.
<h2 id="why-use-mcaptcha">Why use mCaptcha?</h2> 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
<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 share their knowledge with others. If everything was labeled
intellectual property, we might still be stuck in Stone Age. The idea of 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 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 code is freely available(both as in freedom and beers) at <a href=https://github.com/mCaptcha/>our
GitHub</a>.</p> GitHub</a>.</p><h2 id=resources>Resources</h2><ul><li><a href=https://github.com/mCaptcha/guard>guard</a> - mCaptcha backend <code>AGPL</code></li><li><a href=https://github.com/mCaptcha/browser>frontend library</a> - mCaptcha frontend library. <code>MIT/APACHE</code></li></ul></article><div class="docs-navigation d-flex justify-content-between"><a href=/blog/pow-performance/><div class="card my-1"><div class="card-body py-2">&larr; PoW performance</div></div></a></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/blog/say-hello-to-mcaptcha/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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<li><a href="https://github.com/mCaptcha/guard">guard</a> - mCaptcha backend <code>AGPL</code></li>
<li><a href="https://github.com/mCaptcha/browser">frontend library</a> - mCaptcha frontend library. <code>MIT/APACHE</code></li>
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&larr; PoW performance
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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>
</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><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>
mechanism to guard against bots. In order for this to be effective, the mechanism to guard against bots. In order for this to be effective, the
difficulty factor should be configured properly. If the difficulty difficulty factor should be configured properly. If the difficulty
factor is too high all the time, it will inconvenience the users and if 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> 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
<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 various devices and browsers. The data collected from the survey will be made
public, we believe it will guide sysadmins configure difficulty factor public, we believe it will guide sysadmins configure difficulty factor
properly.</p> 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
<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
to you at the end of the survey.</p> 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>
<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>
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<a href="/blog/december-2021-monthly-report/">
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&larr; December, 2021: Monthly Report
</div>
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<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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<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
hyperlink)</a>. This space is used in hyperlink)</a>. This space is used in
addition to the blog to post short updates.</p> 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><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/community/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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<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!
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 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. 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> 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!
</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. 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> 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!
</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! 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! 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> 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!
</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! 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> 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!
</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. 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: This month, the following things were accomplished:
1. Full LibreJS Compliance The CAPTCHA widget and the admin dashboard are 100% LibreJS compliant!</description> 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
</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. 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> 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.
</item> 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>
<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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<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>
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<li><a class="docs-link" href="/docs/help/troubleshooting/">Troubleshooting</a></li>
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<li><a href="#glue-code">Glue code</a></li>
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<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 It creates an <code>iframe</code> containing the mCaptcha widget and injects the
received verification proof token into a hidden input field.</p> received verification proof token into a hidden input field.</p><p>Support is available for various frameworks, see
<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://github.com/mCaptcha/glue"><code>mCaptcha/glue</code></a> for the full list.</p> <a href=https://www.npmjs.com/package/@mcaptcha/core-glue><code>@mcaptcha/core-glue</code></a>,
<p>For frameworks without official support, a low-level library, 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
<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 the backend, generates proof and submits it for verification. If
verification is successful, it sends a message containing the verification is successful, it sends a message containing the
verification proof token to the parent window, assuming it&rsquo;s loaded as verification proof token to the parent window, assuming it&rsquo;s loaded as
an <code>iframe</code>.</p> an <code>iframe</code>.</p><ul><li>Source code:
<ul> <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
<li>Source code: polyfill(<a href=https://github.com/mCaptcha/pow_sha256-polyfill><code>pow_sha256-polyfill</code></a>)
<a href="https://github.com/mCaptcha/mCaptcha/tree/master/templates/widget"><code>mCaptcha/mCaptcha/templates/widget</code></a></li> 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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<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>
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<meta http-equiv="x-ua-compatible" content="ie=edge"> <a href=https://github.com/robkorn/pow_sha256>@robkorn</a>) with some new
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> 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
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-regular.woff2" type="font/woff2" crossorigin> unique salts.</li></ul><p>Other small changes have also been included of various importance but
<link rel="preload" as="font" href="/fonts/vendor/jost/jost-v4-latin-700.woff2" type="font/woff2" crossorigin> 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>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>
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<li>PoW datatype now offers a constructor</li>
<li>Salt is no longer hard coded into the library, users can provide
unique salts.</li>
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<p>Other small changes have also been included of various importance but
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<h1>Troubleshooting</h1>
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<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
the instance is deployed at another hostname, please try setting the instance is deployed at another hostname, please try setting
<code>MCAPTCHA_SERVER_DOMAIN</code> environment variable to the hostname at which <code>MCAPTCHA_SERVER_DOMAIN</code> environment variable to the hostname at which
your instance is deployed or setting the equivalent in config.toml:</p> your instance is deployed or setting the equivalent in config.toml:</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-toml data-lang=toml><span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">1</span>[server]
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>domain=mydomain
</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 </code></pre></div><p class=edit-page><a href=https://git.batsense.net/mCaptcha/website/blob/master/content/docs/help/troubleshooting.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/self-hosting/dependencies/><div class="card my-1"><div class="card-body py-2">&larr; Database and cache</div></div></a><a class=ms-auto href=/docs/api/browser/><div class="card my-1"><div class="card-body py-2">Browser libraries &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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<?xml version="1.0" encoding="utf-8" standalone="yes"?> <?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:
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"> 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.
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<description>2. Configure mcaptcha is highly configurable.
Configuration is applied/merged in the following order: 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: 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> 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.
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Configuration is applied/merged in the following order: 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. 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: 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> 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></item><item><title>Database and cache</title><link>/docs/self-hosting/dependencies/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>/docs/self-hosting/dependencies/</guid><description>Notes Database Database migrations are baked into the server binary so don&amp;rsquo;t worry about them.
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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. 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> Redis Redis is an optional dependency.</description></item></channel></rss>
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<meta http-equiv="x-ua-compatible" content="ie=edge"> 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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<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
language&rsquo;s package registry. Rust language toolchain is required to 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 install from crates.io, please see <a href=https://rustup.rs>rustup.rs</a> for
Instructions to install it.</p> 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
<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 </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
</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> <a href=https://dl.mcaptcha.org/mcaptcha/cli>dl.mcaptcha.org</a> for a variety of
<p>Nightly builds and stable releases are regularly published to 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
<a href="https://dl.mcaptcha.org/mcaptcha/cli">dl.mcaptcha.org</a> for a variety of <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
CPU architectures and operating systems.</p> <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
<ol> </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
<li>Download binary, checksum and GPG signature files</li> </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
</ol> <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
<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 </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
</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 </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
</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 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
</span></span></code></pre></div><ol start="2"> </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
<li>Verify checksum</li> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>/usr/local/bin
</ol> </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
<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 tool can be used in three different modes compute challenge:</p><ol><li>Protected Page: Compute mCaptcha challenge for the CAPTCHA at a
</span></span></code></pre></div><ol start="3"> 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
<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
mCaptcha widget (example: showcase.mcaptcha.org) and run the CLI tool mCaptcha widget (example: showcase.mcaptcha.org) and run the CLI tool
with it to get an authorization code: with it to get an authorization code:
Compute challenge using the URL</p> 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/
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>Authorization token: eRAZJiMrW58uDYA1s64Tmwq1u30HutuF
</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 </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></span></code></pre></div><h3 id="widget-url">Widget URL<a href="#widget-url" class="anchor" aria-hidden="true">#</a> </h3> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>
<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> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</span>Usage: mcaptcha-cli online --url &lt;URL&gt;
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</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="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</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">3</span><span>Usage: mcaptcha-cli online --url &lt;URL&gt; <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></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="margin-right:.4em;padding:0 .4em;color:#7f7f7f">7</span> -h, --help Print <span style=color:#8be9fd;font-style:italic>help</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: </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></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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</span>Authorization token: 3xleN26OctBuVu3X4t6CYyUjErhaxQvz
</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> </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
</span></span></code></pre></div><p>Example usage:</p> 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
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</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>Authorization token: 3xleN26OctBuVu3X4t6CYyUjErhaxQvz <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></span></code></pre></div><h3 id="developer-mode-offline">[Developer mode] Offline<a href="#developer-mode-offline" class="anchor" aria-hidden="true">#</a> </h3> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</span>
<p>Useful while debugging mCaptcha configurations, works on raw challenge <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</span>Options:
parameters.</p> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">6</span> -s, --salt &lt;SALT&gt; Salt with which PoW should be computed
<p>Help menu:</p> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">7</span> -p, --phrase &lt;PHRASE&gt; Phrase over which PoW should be computed
<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 style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">8</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">2</span><span> <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">9</span> -h, --help Print <span style=color:#8be9fd;font-style:italic>help</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; </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></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="margin-right:.4em;padding:0 .4em;color:#7f7f7f">2</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">5</span><span>Options: <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">3</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">6</span><span> -s, --salt &lt;SALT&gt; Salt with which PoW should be computed <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">4</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">7</span><span> -p, --phrase &lt;PHRASE&gt; Phrase over which PoW should be computed <span style="margin-right:.4em;padding:0 .4em;color:#7f7f7f">5</span>result: <span style=color:#bd93f9>340276562956196291522979356090220150471</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> -d, --difficulty-factor &lt;DIFFICULTY_FACTOR&gt; Difficulty Factor </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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<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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<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>
</ol>
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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
factors</a> for normal traffic levels factors</a> for normal traffic levels
for their website.</p> 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
<p><strong>Lowest advisable difficulty factor is 5000.</strong></p> every 30 seconds, I will set a <a href=/docs/terminology/cooldown-period>cool
<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 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 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> difficulty factor of 5000.</p><p>There are two modes to setting difficulty factor for your website on
<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
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 configuration that should work for your website. Currently, easy mode is
guided by assumptions on suitable difficulty factors to protect a guided by assumptions on suitable difficulty factors to protect a
website but it will be fine-tuned as mCaptcha sees more deployment.</p> 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
<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
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
on their website. It has options to set the difficulty factor for each on their website. It has options to set the difficulty factor for each
level of traffic(or visitor threshold, in mCaptcha speak), fully taking level of traffic(or visitor threshold, in mCaptcha speak), fully taking
advantage of mCaptcha&rsquo;s variable difficulty factor feature.</p> 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
<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 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 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 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 requests over 30 seconds will bring down the service, then the admin can
configure increasing levels of difficulty factor of increasing traffic configure increasing levels of difficulty factor of increasing traffic
levels, effectively rate limiting its users and protecting the levels, effectively rate limiting its users and protecting the
underlying website.</p> 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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<h1 class="text-center">Webmasters</h1>
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<a class="stretched-link" href="/docs/webmasters/configuring-difficulty-factor/">Configuring Difficulty Factor &rarr;</a>
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<a class="stretched-link" href="/docs/webmasters/installing-captcha/">Installing MCaptcha on Your Website &rarr;</a>
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<?xml version="1.0" encoding="utf-8" standalone="yes"?> <?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:
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<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) 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> 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.
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<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.
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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> 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.
</item> 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.
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<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>
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<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>
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