In the same way that I can use a Yubikey or any other FIDO2 hardware key to store resident keys for use with OpenSSH (for example ssh-keygen -t ed25519-sk -O resident -O verify-required) I would like to use my iPhone. I have my iPhone most of the time with me. The Yubikey rather not.
As iOS devices come along with the passkey infrastructure, I was thinking that, in principle, this use-case should be possible. But the passkeys require the scanning of a QR code and I’d like to just connect it via USB. In addition, it would be nice if the iPhone would have a PIN to protect the key.
