Does it only support ecdsa? Surprised they don't use ed25519 in their example. Edit: nope, seems ed25519 supported too https://manpages.ubuntu.com/manpages/foc

Does it only support ecdsa? Surprised they don't use ed25519 in their example. Edit: nope, seems ed25519 supported too https://manpages.ubuntu.com/manpages/focal/en/man1/ssh-keygen.1.html https://manpages.ubuntu.com/manpages/focal/en/man1/ssh-keyge... although internet seems to suggest hardware support is far more limited. Tried generating one on MacOS and indeed my Yubikey seems unsupported.