Term Kind Topic What it is
Multi-Factor Authentication MFA, 2FA practice Authentication Requiring evidence from more than one category — something you know, have, or are — so a single stolen credential is insufficient.
Phishing-Resistant Authentication Origin-Bound Authentication, Unphishable MFA pattern Authentication Authentication whose response cannot be replayed at a site other than the one it was produced for, because the authenticator signs the requesting origin rather than releasing a secret the user could pass on.
Step-Up Authentication pattern Authentication Requiring stronger proof of identity at the moment a consequential action is attempted, rather than applying maximum friction to every session.