Biometric authentication method and system

摘要

A biometric authentication system which detects body characteristics and verifies the characteristics against registered biometric data to perform individual authentication. In 1:n authentication, two or more types (A, B)of biometric data sets of a user (from left and right hands, for example) are registered in a database (4). Verification of the user is attempted using a first type biometric data set, comparing a newly-detected first type data set with those already registered. The system judges whether similar first-type data sets (A) are registered for different users, and if so, verification is attempted on the basis of the second type data set (B). This reduces the risk of erroneously identifying an individual, particularly when the threshold for verification needs to be relaxed to deal with variations in the detected biometric data.