Biometric authentication device, biometric information authentication method, and program

A biometric authentication method utilizing biometric information, comprising the steps of:

• acquiring biometric information from a processing device and storing the biometric information in a biometric information storage module;
• authenticating biometric information acquired from said processing device when executing individual authentication and the biometric information stored in said biometric information storage module;
• authenticating, when said biometric information storage module acquires the biometric information, validity with said processing device, mutually;
• counting up a registration counter when the validity is not authenticated by the mutual authentication with said processing device;
• counting up an authentication counter when the validity is not authenticated in the authentication when executing the individual authentication;
• setting a stoppage flag when said registration counter or said authentication counter comes to a value larger than a predetermined value;
• and
• performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing the authentication of the biometric information when performing the individual authentication.

An authentication program utilizing biometric information, the authentication program making a biometric authentication device execute the steps of:

• acquiring biometric information from a processing device and storing the biometric information in a biometric information storage module;
• authenticating biometric information acquired from said processing device when executing individual authentication and the biometric information stored in said biometric information storage module;
• authenticating, when said biometric information storage module acquires the biometric information, validity with said processing device, mutually;
• counting up a registration counter when the validity is not authenticated by the mutual authentication with said processing device;
• counting up an authentication counter when the validity is not authenticated in the authentication when executing the individual authentication;
• setting a stoppage flag when said registration counter or said authentication counter comes to a value larger than a predetermined value;
• and
• performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing the authentication of the biometric information when performing the individual authentication.

An IC card comprising:

• a biometric information storage module storing biometric information;
• a biometric information authenticating module performing authentication by use of biometric information acquired when executing individual authentication and the biometric information stored in said biometric information storage module;
• mutual authentication module mutually authenticating, when acquiring the biometric information for the authentication from a connected processing device, validity with said processing device;
• a registration counter counted when the validity is not authenticated in the authentication by said mutual authentication module;
• an authentication counter counted when the validity is not authenticated in the authentication by said biometric information authenticating module;
• a stoppage flag set when said registration counter or said authentication counter comes to a predetermined value;
• and
• an authentication control module performing control of inhibiting an access to said biometric information storage module when said stoppage flag is set, and of preventing said biometric information authenticating module from executing the authentication process.