https://www.stavros.io/posts/u2f-fido2-with-ssh/ https://www.stavros.io/posts/u2f-fido2-with-ssh/ goes over using FIDO2 devices with ssh, including storing the

https://www.stavros.io/posts/u2f-fido2-with-ssh/ https://www.stavros.io/posts/u2f-fido2-with-ssh/ goes over using FIDO2 devices with ssh, including storing the secret keys on the hardware. In that sense the passphrase becomes the second factor I guess.