US Patent 7788500 Biometric authentication device and terminal

A biometric authentication device and a terminal exhibit high security corresponding to a utilizing mode. The biometric authentication device includes a biometric information storage module performing mutual authentication with an electronic device by use of a common key, acquiring biometric information from the electronic device when validity is mutually authenticated and storing the biometric information in a biometric information storage module, and a biometric information authenticating module effecting the authentication with the electronic device by use of the public key, and authenticating, when the validity is authenticated, the biometric information stored in the biometric information storage module and the present biometric information.