Comment by lxgr
5 months ago
Does OpenSSH's `sshd` even support GPG key revocation? (Assuming you're talking about using the GnuPG card application of Yubikeys, since the newer "native" FIDO security key implementation of OpenSSH does not support importing existing keys to my knowledge.)
I elaborated on sshd + GPG key revocation here: https://news.ycombinator.com/item?id=46026415
Short answer is that it does not.