US Patent 7818583 Personal authentication apparatus

The present invention relates to a personal authentication apparatus which registers biometric information unique to each individual person, captures biometric information on the person anew when authenticating the person, and checks the captured biometric information against registered biometric information, whereby the security of registration is improved. A keyhole into which a physical key is inserted and a sensor which detects biometric information such as palm vein patterns are provided. Registration of a user is permitted only if a key is inserted and turned in the keyhole and a person registered as an administrator is authenticated based on biometric information.