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Re:We updated our RSA SSH host key by mlyle on Friday March 24, 2023 @10:21AM (#35289411)
It's just the agent protocol, used by sshd instead of ssh, to make signing requests with a host key (instead of a user's identity key).
Re:We updated our RSA SSH host key by lxgr on Friday March 24, 2023 @11:42AM (#35290584)
That's cool, I wasn't aware that the server supports the agent protocol as well. Thank you for the pointer!

It makes a lot of sense, since it avoids having to link the HSM/PCKS#11 stuff against sshd.