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<!doctype html><html lang=en-us><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-regular.woff2 type=font/woff2 crossorigin><link rel=preload as=font href=/fonts/vendor/jost/jost-v4-latin-700.woff2 type=font/woff2 crossorigin><link rel=stylesheet href=/main.f4e82f75f039986a07346a99687f11e3218d588abe9b9daa7d0673b1a7aaee5b689ec69619c26a2962d5a124bed33807d58bd84180c249bbb8eddc33c5ef5baa.css integrity="sha512-9OgvdfA5mGoHNGqZaH8R4yGNWIq+m52qfQZzsaeq7ltonsaWGcJqKWLVoSS+0zgH1YvYQYDCSbu47dwzxe9bqg==" 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>Difficulty Factor - mCaptcha</title><meta name=description content="Difficulty factor determines the time it takes to solve a CAPTCHA, there are two modes to setting difficulty factor: advance and easy, this page documents both modes."><link rel=canonical href=/docs/terminology/difficulty-factor/><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="/icon.png"><meta name=twitter:title content="Difficulty Factor"><meta name=twitter:description content="Difficulty factor determines the time it takes to solve a CAPTCHA, there are two modes to setting difficulty factor: advance and easy, this page documents both modes."><meta name=twitter:site content="@"><meta name=twitter:creator content="@"><meta property="og:title" content="Difficulty Factor"><meta property="og:description" content="Difficulty factor determines the time it takes to solve a CAPTCHA, there are two modes to setting difficulty factor: advance and easy, this page documents both modes."><meta property="og:type" content="article"><meta property="og:url" content="/docs/terminology/difficulty-factor/"><meta property="og:image" content="/icon.png"><meta property="article:published_time" content="2022-07-22T00:00:00+00:00"><meta property="article:modified_time" content="2022-08-01T22:27:01+05:30"><meta property="og:site_name" content="mCaptcha"><meta property="article:publisher" content="https://www.facebook.com/"><meta property="article:author" content="https://www.facebook.com/"><meta property="og:locale" content="en_US"><script type=application/ld+json>{"@context":"http://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"\/"},{"@type":"ListItem","position":2,"name":"Docsterminologydifficulty Factor","item":"\/docsterminologydifficulty-factor\/"}]}</script><meta name=theme-color content="#fff"><link rel=apple-touch-icon sizes=180x180 href=/apple-touch-icon.png><link rel=icon type=image/png sizes=32x32 href=/favicon-32x32.png><link rel=icon type=image/png sizes=16x16 href=/favicon-16x16.png><link rel=manifest href=/site.webmanifest></head><body class="docs single"><div class="header-bar fixed-top"></div><header class="navbar fixed-top navbar-expand-md navbar-light"><div class=container><input class="menu-btn order-0" type=checkbox id=menu-btn>
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<span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class="nav-item active"><a class=nav-link href=/docs/introduction/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><div class="row flex-xl-nowrap"><div class="col-lg-5 col-xl-4 docs-sidebar"><nav class=docs-links aria-label="Main navigation"><h3>Introduction</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/introduction/installing-captcha/>Installing mCaptcha on your website</a></li><li><a class=docs-link href=/docs/introduction/configuring-difficulty-factor/>Configuring Difficulty Factor</a></li></ul><h3>Terminology</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/terminology/access-token/>Access token</a></li><li><a class=docs-link href=/docs/terminology/cooldown-period/>Cooldown Period</a></li><li><a class="docs-link active" href=/docs/terminology/difficulty-factor/>Difficulty Factor</a></li><li><a class=docs-link href=/docs/terminology/sitekey/>Site key</a></li><li><a class=docs-link href=/docs/terminology/visitor-threshold/>Visitor Threshold</a></li></ul><h3>Self-Hosted</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/self-hosted/getting-started/>Getting started</a></li><li><a class=docs-link href=/docs/self-hosted/bare-metal/>Deploy bare metal</a></li><li><a class=docs-link href=/docs/self-hosted/docker/>Using Docker</a></li><li><a class=docs-link href=/docs/self-hosted/dependencies/>Database and cache</a></li></ul><h3>API</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/api/browser/>Browser libraries</a></li><li><a class=docs-link href=/docs/api/mcaptcha-system/>mCaptcha System Library</a></li><li><a class=docs-link href=/docs/api/pow-sha256/>pow_sha256</a></li></ul><h3>Help</h3><ul class=list-unstyled><li><a class=docs-link href=/docs/help/troubleshooting/>Troubleshooting</a></li><li><a class=docs-link href=/docs/help/faq/>FAQ</a></li></ul></nav></div><nav class="docs-toc d-none d-xl-block col-xl-3" aria-label="Secondary navigation"><div class=page-links><h3>On this page</h3><nav id=TableOfContents></nav></div></nav><main class="docs-content col-lg-11 col-xl-9"><h1>Difficulty Factor</h1><p class=lead></p><p>Difficulty factor determines the time it takes to solve a CAPTCHA. The
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higher the difficulty factor, the longer it will take to generate a
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proof of work for it to solve the CAPTCHA.</p><p>mCaptcha’s proof of work based mechanism makes it highly accessible to
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people with special needs but it is important to choose the difficulty factor
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with care as very high difficulty factors will make the CAPTCHA
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inaccessible to users on slow devices.</p><p class=edit-page><a href=https://github.com/mCaptcha/website/blob/master/content/docs/terminology/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 GitHub</a></p><div class="docs-navigation d-flex justify-content-between"><a href=/docs/terminology/cooldown-period/><div class="card my-1"><div class="card-body py-2">← Cooldown Period</div></div></a><a class=ms-auto href=/docs/terminology/sitekey/><div class="card my-1"><div class="card-body py-2">Site key →</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.9f6ca8d18a9feb4c8173940752baf80e8075b025ffbfcec12016beb0c2f8f794667102d45eb9accca8c374b0dd7a69af667e0f20813fb4fb086e6cda5230e2d8.js integrity="sha512-n2yo0Yqf60yBc5QHUrr4DoB1sCX/v87BIBa+sML495RmcQLUXrmszKjDdLDdemmvZn4PIIE/tPsIbmzaUjDi2A==" crossorigin=anonymous defer></script></body></html> |