biometrics; biometric authentication
fingerprint recognition; fingerprint authentication
authentication by facial recognition
attestation (investiture) ceremony
authentication code; authenticator
authentication information
identification number; confirmation number; authentication number
verification by image (e.g. CAPTCHA); image authentication
two-factor authentication
two-factor authentication
data origin authentication
message origin authentication
probe origin authentication
peer-entity authentication
authentication token; token
authentication device; security token (e.g. SmartCard)
multi-factor authentication
two-factor authentication