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When will post quantum resistant HTTPS protocols be a thing? (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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Some services are slowly developing post quantum resistant protocols for their services like Signal or Tutanota. When will this be a thing for the web?

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[–] [email protected] 2 points 1 year ago (1 children)

Looks like it just concatenates them:

The shared secret is calculated as the concatenation of the X25519 shared secret (32 bytes) and the Kyber768Draft00 shared secret (32 bytes). The resulting shared secret value is 64 bytes in length.

https://www.ietf.org/archive/id/draft-tls-westerbaan-xyber768d00-02.html>

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Huh. I guess whatever algorithm comes next is resistant to half of the secret being compromised, then.

Edit: It looks like they concatenate things from the two algorithms a few times in the process, so maybe they figure it would be difficult to isolate a vulnerability assuming either one is strong.