biometrics; biometric authentication
fingerprint recognition; fingerprint authentication
authentication by facial recognition
attestation (investiture) ceremony
iris recognition; iris identification
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
activation (of a software license); product activation
official whose appointment and dismissal requires Imperial acknowledgement (acknowledgment)
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; MFA
two-factor authentication
authentication email; validation email; verification email
email authentication; email validation
smartphone authentication; two-factor authentication (using a smartphone)
iris recognition; iris identification