Patent ID: 7788500

Claim:
A biometric authentication device comprising: a central processing unit for executing a mutual authentication module performing mutual authentication with an electronic device for registering biometric information in said biometric authentication device by use of a common key shared with said electronic device; a biometric information storage module acquiring, when said mutual authentication module authenticates validity mutually, said biometric information from said electronic device, and storing said biometric information in said biometric information storage module; a public key authentication module causing said electronic device or another electronic device for authenticating said biometric information to authenticate validity of said biometric authentication device by use of a public key enabling mutual encryption and mutual decryption between said biometric authentication device and said electronic device or said another electronic device; and a biometric information authentication module authenticating, when the validity of said biometric authentication device is authenticated by said electronic device or said another electronic device, said biometric information stored in said biometric information storage module and present biometric information acquired from said electronic device or said another electronic device.