Can it also be used for SSH logins without much bending of the concepts?
And does it allow extensions, e.g. secure login through a smartwatch + NFC, and similar ideas?
And does it allow extensions, e.g. secure login through a smartwatch + NFC, and similar ideas?
There is also pam-u2f: https://developers.yubico.com/pam-u2f/
and https://github.com/bluecmd/openssh-u2f (not in upstream)