SSH with FIDO/U2F
Since OpenSSH Version 8.2 FIDO/U2F is supported. Type this into your terminal 1 ssh -V to find out the version of the SSH installation. To enhance SSH with FIDO/U2F, in this example with a Yubikey #Ad or with the cheaper Yubikey FIDO #Ad, the following steps are required: Create new private and public keys with the option -t ed25519-sk and with the option -f id_ed25519_sk write it into a file in the local SSH directory. During this process the Yubikey #Ad gets “married” with the private key. ...