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Timeline to remove DSA support in OpenSSH
(lists.mindrot.org)
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Finally! I wish OpenSSH also plan making RSA optional at build time, and set a timeline for removal shifted 1 or 2 years after DSA.
That's great news, if OpenSSH contributors commit to adding post-quantum cryptography, it's bigger news than DSA removal.
That's doable for the server - but an OpenSSH client without RSA support will be useless for the next one or two decades, assuming the various appliance and cloud vendors react faster than they usually do.
The problem seems to be finding a post-quantum algorithm that doesn't get obliterated by pre-quantum computers like what happened to SIKE:
https://m-cacm.acm.org/news/269080-nist-post-quantum-cryptography-candidate-cracked/fulltext