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<!DOCTYPE html>
<html class="nojs">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width initial-scale=1" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Namecoin</title>
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<a class="navbar-brand" href='/'><img src='/images/logo.png' alt="Namecoin" /></a>
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<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" tabindex="">Get Started</a>
<ul class="dropdown-menu">
<li><a href='/download/'>Download</a></li>
<li><a href='/get-started/name-wallets/'>Name Wallets</a></li>
<li><a href='/get-started/get-namecoins/'>Get Namecoins</a></li>
<li><a href='/docs/name-owners/'>Docs for Domain Owners</a></li>
</ul>
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<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" tabindex="">Dot-Bit</a>
<ul class="dropdown-menu">
<li><a href='/dot-bit/'>Home</a></li>
<li><a href='/dot-bit/browsing-instructions/'>Browsing Instructions</a></li>
<li><a href='/dot-bit/security-model/'>Security Model</a></li>
</ul>
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<li><a href='/docs/faq/'>FAQ</a></li>
<li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" tabindex="">Resources</a>
<ul class="dropdown-menu">
<li><a href='/resources/chat/'>Matrix/IRC Chat</a></li>
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<li><a href='/resources/presentations/'>Presentations</a></li>
<li><a href='/explorers/'>Explorers</a></li>
<li><a href='https://metrics.namecoin.org/'>Metrics</a></li>
<li><a href='/resources/whitepaper/'>Whitepaper</a></li>
<li><a href="https://github.com/namecoin/meta/blob/master/roadmap.md">Roadmap➚</a></li>
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<li><a href='/team/'>Team</a></li>
<li><a href='/news/'>News</a></li>
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</header>
<div id="fancy-graphic"><div class="container-fluid"><p id="tagline">
<span id="default-tagline">
<strong>Supporting<br />free speech.</strong>
</span>
<span class="candidate-tagline" hidden>
<strong>In information</strong><br />we <strong>trust</strong>.
</span>
<span class="candidate-tagline" hidden>
A <strong>trust anchor</strong><br />for the Internet.
</span>
<span class="candidate-tagline" hidden>
<strong>Against<br />censorship.</strong>
</span>
<span class="candidate-tagline" hidden>
<strong>Supporting<br />free speech.</strong>
</span>
<span class="candidate-tagline" hidden>
Decentralized<br /><strong>secure</strong> names.
</span>
<span class="candidate-tagline" hidden>
<strong>Decentralize</strong><br>all the things!
</span>
<span class="candidate-tagline" hidden>
<strong>Freedom</strong><br>of information.
</span>
</p></div></div>
<div id="content">
<div class="container-fluid">
<div class="post">
<header class="post-header">
<h1 class="post-title">Namecoin</h1>
</header>
<article class="post-content">
<p><strong>Namecoin</strong> is an experimental open-source technology which improves decentralization, security, censorship resistance, privacy, and speed of certain components of the Internet infrastructure such as DNS and identities.</p>
<p>(For the technically minded, Namecoin is a key/value pair registration and transfer system based on the Bitcoin technology.)</p>
<p><em>Bitcoin frees money – Namecoin frees DNS, identities, and other technologies.</em></p>
<div class="row">
<div class="col-md-6">
<h2 id="what-can-namecoin-be-used-for">What can Namecoin be used for?</h2>
<ul>
<li>Protect free-speech rights online by making the web more resistant to censorship.</li>
<li>Human-meaningful Tor .onion domains.</li>
<li>Decentralized TLS (HTTPS) certificate validation, backed by blockchain consensus.</li>
<li>Access websites using the .bit top-level domain.</li>
<li>Attach identity information such as GPG and OTR keys and email, Bitcoin, and Bitmessage addresses to an identity of your choice.</li>
</ul>
</div>
<div class="col-md-6">
<h2 id="what-does-namecoin-do-under-the-hood">What does Namecoin do under the hood?</h2>
<ul>
<li>Securely record and transfer arbitrary names (keys).</li>
<li>Attach a value (data) to the names (up to 520 bytes).</li>
<li>Transact the digital currency namecoins (NMC).</li>
<li>Like bitcoins, Namecoin names are difficult to censor or seize.</li>
<li>Lookups do not generate network traffic (improves privacy).</li>
</ul>
<p><strong>Namecoin</strong> was the first fork of <a href="https://bitcoin.org">Bitcoin</a> and still is one of the most innovative “altcoins”. It was first to implement <a href="https://bitcoin.stackexchange.com/questions/273/how-does-merged-mining-work">merged mining</a> and a <a href="/dot-bit/">decentralized DNS</a>. <strong>Namecoin</strong> was also the first solution to <a href="https://en.wikipedia.org/wiki/Zooko%27s_triangle">Zooko’s Triangle</a>, the long-standing problem of producing a naming system that is simultaneously secure, decentralized, and human-meaningful.</p>
</div>
</div>
<h2 id="more-information">More Information</h2>
<ul>
<li><a href="/dot-bit/">.bit DNS</a></li>
<li><a href="https://nameid.org">Namecoin Identities</a></li>
</ul>
<h2 id="news">News</h2>
<p>(<a href="/feed.rss">RSS Feed</a>)</p>
<h3 id="namecoin-will-be-at-fosdem-2026"><a href="/2026/01/26/fosdem-2026.html">Namecoin will be at FOSDEM 2026</a></h3>
<p><strong><a href="/2026/01/26/fosdem-2026.html">2026-01-26</a></strong> We’re happy to announce that Namecoin will have a presence at <a href="https://www.fosdem.org/2026/">FOSDEM 2026</a> in Brussels, January 31 - February 1. We expect to give a talk; check out the FOSDEM schedule to find us (or find our absence, if we are unlucky). Recordings and live-streams may happen as well.</p>
<p><a href="/2026/01/26/fosdem-2026.html">Read more…</a></p>
<h3 id="namecoin-will-be-at-39c3"><a href="/2025/12/17/39c3.html">Namecoin will be at 39C3</a></h3>
<p><strong><a href="/2025/12/17/39c3.html">2025-12-17</a></strong> We’re happy to announce that Namecoin will have an Assembly at <a href="https://events.ccc.de/congress/2025/wiki/index.php/Main_Page">39C3 (the 39th Chaos Communication Congress)</a> in Hamburg, December 27-30. We will once again be hosted by the <a href="https://decentral.community/">CDC (Critical Decentralization Cluster)</a>.</p>
<p><a href="/2025/12/17/39c3.html">Read more…</a></p>
<h3 id="introducing-encasha-off-chain-sshfp-records"><a href="/2025/09/27/encasha-off-chain-sshfp-records.html">Introducing Encasha: Off-Chain SSHFP Records</a></h3>
<p><strong><a href="/2025/09/27/encasha-off-chain-sshfp-records.html">2025-09-27</a></strong> Since Encaya now supports off-chain <code class="highlighter-rouge">TLSA</code> records (used for TLS server authentication), this begs a question: can something similar be done for <code class="highlighter-rouge">SSHFP</code> records (used for SSH server authentication)?</p>
<p><a href="/2025/09/27/encasha-off-chain-sshfp-records.html">Read more…</a></p>
<h3 id="namecoin-at-gcer-2025"><a href="/2025/09/26/gcer-2025.html">Namecoin at GCER 2025</a></h3>
<p><strong><a href="/2025/09/26/gcer-2025.html">2025-09-26</a></strong> I represented Namecoin at the <a href="https://www.kipr.org/gcer">2025 Global Conference on Educational Robotics</a> (July 8-12, 2025 in Norman, OK). If you enjoy STEM education talks, this presentation might be up your alley.</p>
<p><a href="/2025/09/26/gcer-2025.html">Read more…</a></p>
<h3 id="is-post-quantum-namecoin-tls-feasible"><a href="/2025/09/23/is-post-quantum-namecoin-tls-feasible.html">Is Post-Quantum Namecoin TLS Feasible?</a></h3>
<p><strong><a href="/2025/09/23/is-post-quantum-namecoin-tls-feasible.html">2025-09-23</a></strong> As the shelf life of most public-key cryptography nears its quantum-induced termination, many protocols are moving toward post-quantum (PQ) cryptography. PQ crypto, defined as cryptosystems that are believed to be secure against both classical and quantum cryptanalysis, is an active research area, with rapid advances happening in both the cryptosystems and the attacks. It would be nice if we had more time to research secure PQ cryptosystems, but alas we do not have that luxury. TLS is thus beginning to deploy PQ crypto. Which begs the question: how is Namecoin affected by PQ crypto adoption in TLS?</p>
<p><a href="/2025/09/23/is-post-quantum-namecoin-tls-feasible.html">Read more…</a></p>
<h3 id="off-chain-tlsa-records-in-encaya"><a href="/2025/09/22/off-chain-tlsa-records-in-encaya.html">Off-Chain TLSA Records in Encaya</a></h3>
<p><strong><a href="/2025/09/22/off-chain-tlsa-records-in-encaya.html">2025-09-22</a></strong> Now that <a href="/2025/09/11/hashed-tlsa-records-in-encaya.html">hashed TLSA records</a> are a thing, it’s time to ask our inner mad scientist: can we do any better than that?</p>
<p><a href="/2025/09/22/off-chain-tlsa-records-in-encaya.html">Read more…</a></p>
<h3 id="generate_nmc_cert-is-now-ncgencert"><a href="/2025/09/20/generate-nmc-cert-is-now-ncgencert.html">generate_nmc_cert is now ncgencert</a></h3>
<p><strong><a href="/2025/09/20/generate-nmc-cert-is-now-ncgencert.html">2025-09-20</a></strong> If you’ve used <code class="highlighter-rouge">generate_nmc_cert</code> to set up a Namecoin TLS server, you’ve probably found the interface a tad vexing. Examples of such weirdness:</p>
<p><a href="/2025/09/20/generate-nmc-cert-is-now-ncgencert.html">Read more…</a></p>
<h3 id="hashed-tlsa-records-in-encaya"><a href="/2025/09/11/hashed-tlsa-records-in-encaya.html">Hashed TLSA Records in Encaya</a></h3>
<p><strong><a href="/2025/09/11/hashed-tlsa-records-in-encaya.html">2025-09-11</a></strong> As long-time readers will be aware, probably the biggest innovation of Namecoin’s TLS functionality is that it uses a special form of TLS certificates that happens to work well in mainstream web browsers, via the interoperability magic of AIA and PKCS#11. This avoids having to patch web browsers or intercept TLS connections (either of which would introduce nontrivial security liabilities).</p>
<p><a href="/2025/09/11/hashed-tlsa-records-in-encaya.html">Read more…</a></p>
<h3 id="whats-the-maximum-length-of-an-aia-issuer-url-in-windows-11-cryptoapi"><a href="/2025/09/07/whats-maximum-length-aia-issuer-url-windows-11-cryptoapi.html">What’s the maximum length of an AIA Issuer URL in Windows 11 CryptoAPI?</a></h3>
<p><strong><a href="/2025/09/07/whats-maximum-length-aia-issuer-url-windows-11-cryptoapi.html">2025-09-07</a></strong> For those of you who haven’t seen my various conference talks about Namecoin TLS, AIA (<em>Authority Information Access</em>) is a mechanism for a TLS certificate to provide a URL where you can find the certificate of its issuer. Namecoin does some, uh, <em>creative</em> things with AIA. For reasons that will be elaborated on in a future post (don’t worry, all will be explained there), I wanted to know the maximum length of the URL that AIA can link to.</p>
<p><a href="/2025/09/07/whats-maximum-length-aia-issuer-url-windows-11-cryptoapi.html">Read more…</a></p>
<h3 id="improving-sockstrace-debugging-process-control-and-proxy-rules"><a href="/2025/07/25/sockstrace-improvements.html">Improving sockstrace: Debugging, Process Control, and Proxy Rules</a></h3>
<p><strong><a href="/2025/07/25/sockstrace-improvements.html">2025-07-25</a></strong> sockstrace just got a major update. Here’s a quick overview of the new features:</p>
<p><a href="/2025/07/25/sockstrace-improvements.html">Read more…</a></p>
<p><a href="/news/">Earlier news</a></p>
<p>For the latest news go to the <a href="https://forum.namecoin.org/">Namecoin forum</a> or check out <a href="https://www.reddit.com/r/Namecoin">r/Namecoin</a>.</p>
<p>Official anouncements will also be made on <a href="https://bitcointalk.org/index.php?topic=236340.0">this BitcoinTalk thread</a>.</p>
<h2 id="donate">Donate</h2>
<p>Help keep us <strong>strong</strong>. <a href="/donate/">You can donate to the Namecoin project here.</a></p>
<h2 id="participate">Participate</h2>
<p>With <strong>Namecoin</strong> you can make a difference. We need your <strong>help to free information</strong>, especially in documentation, marketing, and <a href="https://github.com/namecoin/">coding</a>. You are welcome at the <a href="https://forum.namecoin.org/">forum</a>. There may be <a href="https://forum.namecoin.org/viewforum.php?f=18">bounties</a>, too.</p>
</article>
</div>
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</div>
<footer class="site-footer">
<div class="container-fluid" id="social">
<ul class="list-inline">
<li><a href="https://github.com/namecoin"><i class="fa fa-github fa-2x" title="GitHub">GitHub</i></a></li>
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<li><a href="https://www.reddit.com/r/Namecoin"><i class="fa fa-reddit-alien fa-2x" title="Reddit">Reddit</i></a></li>
<li><a href="https://forum.namecoin.org/"><i class="fa fa-comments fa-2x" title="Forum">Forum</i></a></li>
<li><a href="/license.html"><i class="fa fa-2x" title="Copyright">Copyright</i></a></li>
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<div class="container-fluid" id="page-source">
<a href="https://github.com/namecoin/namecoin.org/blob/master/index.md"><i>Submit corrections or improvements to this page</i></a>
</div>
<div class="container-fluid" id="page-alternate">
<ul class="list-inline">
<li>This page is available via:</li>
<li><a href="https://www.namecoin.org/">DNS (namecoin.org)</a></li>
<li><a href="https://www.rw6nbpjrmcpdxszn3air4bt7t75rpz4cp3c2kbdu72ptua57tzvin4id.onion/">Onion</a></li>
<li><a href="http://127.0.0.1:43110/1EZSUprqJQph9JwKg3gAJtiNs899vatZTo/">ZeroNet</a></li>
<li><a href="https://namecoin.bit/">Namecoin (namecoin.bit)</a></li>
</ul>
</div>
<div class="container-fluid" id="funders">
<p>Thanks to our funders:</p>
<ul class="list-inline">
<li class="funder">Handshake</li>
<li class="funder"><a href='https://powerupprivacy.com/'>Power Up Privacy</a></li>
<li class="funder"><a href='https://cyberia.club/'>Cyberia Computer Club (Capsul)</a></li>
<li class="funder"><a href='https://www.cyphermarket.com/'>Cypher Market</a></li>
<li class="funder"><a href='https://autonomousworlds.com/'>Autonomous Worlds Ltd (Xaya)</a></li>
<li class="funder"><a href='https://nlnet.nl/core/'>NLnet Foundation (Next Generation Internet Zero: Core)</a></li>
<li class="funder"><a href='https://www.torproject.org/'>Tor Project (via Outreachy)</a></li>
<li class="funder">European Commission Directorate-General for Communications Networks, Content and Technology (via Next Generation Internet: Assure)</li>
<li class="funder">European Commission Directorate-General for Communications Networks, Content and Technology (via Next Generation Internet Zero: Core)</li>
<li class="funder"><a href='https://nlnet.nl/assure/'>NLnet Foundation (Next Generation Internet: Assure)</a></li>
<li class="funder"><a href='https://www.outreachy.org/'>Software Freedom Conservancy (Outreachy)</a></li>
<li class="funder">European Commission Directorate-General for Communications Networks, Content and Technology (via Next Generation Internet Zero: Search and Discovery)</li>
<li class="funder"><a href='https://nlnet.nl/internethardening/'>NLnet Foundation (Internet Hardening Fund)</a></li>
<li class="funder"><a href='https://www.f2pool.com/'>F2Pool</a></li>
<li class="funder">Cyphrs</li>
<li class="funder"><a href='https://nlnet.nl/discovery/'>NLnet Foundation (Next Generation Internet Zero: Search and Discovery)</a></li>
<li class="funder"><a href='https://www.rijksoverheid.nl/ministeries/ministerie-van-economische-zaken-en-klimaat'>Netherlands Ministry of Economic Affairs and Climate Policy (via Internet Hardening Fund)</a></li>
</ul>
</div>
<div class="container-fluid" id="disclaimer">
<p>Namecoin is produced independently from the Tor® anonymity software and carries no guarantee from The Tor Project about quality, suitability or anything else.</p>
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