Patent ID: 8423786

Claim:
A biometrics authentication device, which detects characteristics of a body of a user and performs individual authentication, comprising: a detection device, which detects a portion of interest of the body, and outputs biometrics data indicating biometrics characteristics; a database file, which stores one biometrics data portion divided from the biometrics data of each of a plurality of user detected by the detection device; an individual media for storing another biometrics data portion divided from the biometrics data of the user, and a first biometrics information key generated from a data area which covers both of the one biometrics data portion and the another biometrics data portion which is divided; and a control unit which, at the time of authentication using the individual media, combines the another biometrics data portion of the individual media with the one biometrics data portion of the database file, creates second biometrics information key from a data area which covers both of the one biometrics data portion and the another biometrics data portion, compares the first biometrics information key read from the individual media with the created second biometrics information key, and, when the comparison result is matched, verifies the combined biometrics data against the biometrics data obtained from the detection device, and wherein the control unit, when the comparison result is mismatched, retrieves second one biometrics data portion from the database file, combines the another biometrics data portion on the individual media and the second one biometrics data portion retrieved from the database file, creates a second biometrics information key from a data area which covers both of the second one biometrics data portion and the another biometrics data portion and compares the first biometrics information key read from the individual media with the created second biometrics information key.