To put this in context: You should have been avoiding 64-bit block ciphers to begin with.<p><a href="https://gist.github.com/tqbf/be58d2d39690c3b366ad" rel="nofollow">https://gist.github.com/tqbf/be58d2d39690c3b366ad</a><p>Furthermore, as the article says from the getgo, birthday attacks are not <i>new</i>. They are a known problem.<p>What's new is someone wrote a paper describing a practical attack, and actually bothered to generate enough traffic to exploit the birthday bound of a 64-bit block cipher.<p>Your takeaway from this should be:<p><pre><code> - If it's not AES or CHACHA20, disable it.
- If it's not AES_GCM or CHACHA20_POLY1305, consider disabling it.</code></pre>