Method and system for biometric authentication for large numbers of enrolled persons

A method comprising:

• at one or more biometric sensors, recording current biometric features of a person,
• at a matching server, comparing currently recorded biometric features of the person with prestored biometric features of enrolled persons while applying one or more identifying acceptance tolerances, and signalling positive authentication in case of a match,
• at a user device of the person, in case of no positive authentication at the matching server, enabling selecting prestored biometric features of the person at the matching server for comparison with the currently recorded biometric features while applying a verifying acceptance tolerance, and signalling positive authentication in case of successful verification.

A system comprising:

• one or more biometric sensors for recording current biometric features of a person,
• a matching server for comparing currently recorded biometric features of the person with prestored biometric features of enrolled persons while applying one or more identifying acceptance tolerances, and signalling positive authentication in case of a match,
• a user device of the person for enabling, in case of no positive authentication, selecting prestored biometric features of the person at the matching server for comparison with the currently recorded biometric features while applying a verifying acceptance tolerance, and signalling positive authentication in case of successful verification.