Biometric authentication apparatus and biometric authentication method

A biometric authentication method comprising:

• when receiving a delete request, for any of a plurality of registrants, to delete authentication information obtained from biometric information of the registrant, registering identification information of the registrant on a deletion list;
• deleting, at predetermined time, the authentication information of the registrant corresponding to the identification information registered on the deletion list from a storage device which stores the identification information and the authentication information of each of the plurality of registrants;
• and
• matching the biometric information of each registrant of which the identification information is not registered on the deletion list among the plurality of registrants with biometric information of a user based on the authentication information of the each registrant and authentication information extracted from biometric data representing biometric information of a user acquired by a biometric information acquisition device and not matching the biometric information of each registrant of which the identification information is registered on the deletion list among the plurality of registrants with the biometric information of the user to determine whether or not to authenticate the user as any of the plurality of registrants other than the registrants corresponding to the identification information registered on the deletion list.

A non-transitory computer-readable recording medium having recorded thereon a computer program for biometric authentication that causes a computer to execute a process comprising:

• when receiving a delete request, for any of a plurality of registrants, to delete authentication information obtained from biometric information of the registrant, registering identification information of the registrant on a deletion list;
• deleting, at predetermined time, the authentication information of the registrant corresponding to the identification information registered on the deletion list from a storage device which stores the identification information and the authentication information of each of the plurality of registrants;
• and
• matching the biometric information of each registrant of which the identification information is not registered on the deletion list among the plurality of registrants with biometric information of a user based on the authentication information of the each registrant and authentication information extracted from biometric data representing biometric information of a user acquired by a biometric information acquisition device and not matching the biometric information of each registrant of which the identification information is registered on the deletion list among the plurality of registrants with the biometric information of the user to determine whether or not to authenticate the user as any of the plurality of registrants other than the registrants corresponding to the identification information registered on the deletion list.