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<title>
libmceliece: People</title>
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<div class=headline>
libmceliece</div>
<div class=nav>
<div class="navt away"><a href=index.html>Intro</a>
</div><div class="navt away"><a href=download.html>Download</a>
</div><div class="navt away"><a href=install.html>Install</a>
</div><div class="navt away"><a href=api.html>API</a>
</div><div class="navt away"><a href=cli.html>CLI</a>
</div><div class="navt away"><a href=security.html>Security</a>
</div><div class="navt away"><a href=verification.html>Verification</a>
</div><div class="navt away"><a href=internals.html>Internals</a>
</div><div class="navt here">People
</div><div class="navt away"><a href=license.html>License</a>
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<p>libmceliece is based on the official Classic McEliece software, which
was written by Tung Chou. See the following papers for the major
algorithms used for speed inside that software:</p>
<ul>
<li>
<p>Daniel J. Bernstein, Tung Chou, Peter Schwabe. "McBits: fast
constant-time code-based cryptography." CHES 2013.
<a href="https://tungchou.github.io/papers/mcbits.pdf">https://tungchou.github.io/papers/mcbits.pdf</a></p>
</li>
<li>
<p>Tung Chou. "McBits revisited." CHES 2017.
<a href="https://tungchou.github.io/papers/mcbits_revisited.pdf">https://tungchou.github.io/papers/mcbits_revisited.pdf</a></p>
</li>
</ul>
<p>The official Classic McEliece software includes <code>ref</code>, <code>vec</code>, <code>sse</code>, and
<code>avx</code> implementations; libmceliece includes only <code>vec</code> and <code>avx</code>.</p>
<p>The following components of libmceliece are from Daniel J. Bernstein:</p>
<ul>
<li>
<p>Small <a href="download.html#changelog">changes</a>
for namespacing, portability, etc.</p>
</li>
<li>
<p>Software to compute control bits (also used in the official software).
See the following paper: Daniel J. Bernstein. "Verified fast formulas
for control bits for permutation networks." 2020.
<a href="https://cr.yp.to/papers.html#controlbits">https://cr.yp.to/papers.html#controlbits</a></p>
</li>
<li>
<p><code>crypto_sort/int32</code>. See <a href="https://sorting.cr.yp.to">https://sorting.cr.yp.to</a>.</p>
</li>
<li>
<p>Infrastructure to build a library with automatic run-time selection of
implementations based on the run-time CPU and a database of
benchmarks. This infrastructure was introduced in
<a href="https://lib25519.cr.yp.to"><code>lib25519</code></a>, with some extensions and
adaptations in libmceliece.</p>
</li>
<li>
<p>Various software for tests and benchmarks. This is based on
public-domain code in the SUPERCOP benchmarking framework.</p>
</li>
</ul>
<p>The underlying <code>crypto_xof/shake256</code> software currently includes two
SHAKE256 implementations. The <code>tweet</code> implementation is based on
<a href="https://twitter.com/tweetfips202">https://twitter.com/tweetfips202</a>
by Daniel J. Bernstein, Peter Schwabe, and Gilles Van Assche. The
<code>unrollround</code> implementation is from Daniel J. Bernstein.</p><hr><font size=1><b>Version:</b>
This is version 2023.02.18 of the "People" web page.
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