C.<p><span class="h-card" translate="no"><a href="https://mastodon.cr.yp.to/@djb" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>djb</span></a></span> (Daniel J. Bernstein) tooted about a new blog post[1] he published. It's here:<br><a href="https://blog.cr.yp.to/20250118-flight.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">blog.cr.yp.to/20250118-flight.</span><span class="invisible">html</span></a></p><p>It's interesting. He's a <a href="https://mindly.social/tags/mathematician" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mathematician</span></a> and software guy that in more recent years has been known mostly for his work in <a href="https://mindly.social/tags/cryptography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cryptography</span></a>, <a href="https://mindly.social/tags/theoretical" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>theoretical</span></a> and <a href="https://mindly.social/tags/practical" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>practical</span></a>. You're probably using his <a href="https://mindly.social/tags/Curve25519" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Curve25519</span></a> every day in your <a href="https://mindly.social/tags/communications" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>communications</span></a>.</p><p>I'm not a mathematician (by a long shot), but it's written in a pretty accessible manner - it's not <a href="https://mindly.social/tags/formulae" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>formulae</span></a> and <a href="https://mindly.social/tags/turgid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>turgid</span></a> academic <a href="https://mindly.social/tags/prose" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>prose</span></a>.</p><p>The central point he's getting at, by my possibly-mistaken understanding of it, is that current "common sense" about when attacks against pre-quantum cryptography like <a href="https://mindly.social/tags/RSA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RSA</span></a> (and therefore when post-quantum cryptography becomes critical) are badly mistaken - based on bad assumptions about how attacks work, how they're implemented, and on badly <a href="https://mindly.social/tags/extrapolating" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>extrapolating</span></a> from those bad assumptions using logic that doesn't actually represent the way attacks are developed and become practical.</p><p>TL;DR is something along the lines of "<a href="https://mindly.social/tags/quantum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>quantum</span></a> cryptographic attacks against RSA will be practical sooner than most people think, and you should be deploying quantum-resistant cryptography now, not later".</p><p>It's worth reading if you're at all interested in <a href="https://mindly.social/tags/crypto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>crypto</span></a> and <a href="https://mindly.social/tags/security" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>security</span></a> stuff.</p><p>He also mentions a project he's involved in that has been discussed separately, transparent post-quantum tunnelling for unmodified <a href="https://mindly.social/tags/server" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>server</span></a> and <a href="https://mindly.social/tags/client" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>client</span></a> <a href="https://mindly.social/tags/software" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>software</span></a>. Link in post.</p><p>[1] Written more like a conference presentation, FWIW.</p>