Patent ID: 7457442

Claim:
An authentication system for authenticating a user, using the user's biological information, comprising: a mobile storage device of the user; and an authentication device that communicates with the mobile storage device, wherein the authentication device comprises: an interface for sending and receiving information to and from the mobile storage device; an input device which receives input of the user's biological information; and a processing unit which sends to the mobile storage device, via the interface of the authentication device, a command to request information for specifying a biological information feature, extracts from the biological information input via the input device a biological information feature corresponding to the information for specifying the biological information feature from the mobile storage device, sends the extracted biological information feature to the mobile storage device via the interface of the authentication device, and receives a result of matching of the biological information feature, from the mobile storage device via the interface of the authentication device, and wherein the mobile storage device comprises: an interface for sending and receiving information to and from the authentication device; a storage device which stores the user's biological information that is registered in advance, and information for specifying the biological information feature; and a processing unit which, when the command is received from the authentication device, sends to the authentication device, via the interface of the mobile storage device, information for specifying the biological information feature stored in the storage device, and when the biological information feature corresponding to information for specifying the biological information feature is received from the authentication device, matches the biological information feature from the authentication device and the biological information feature inside the storage device, and sends a result of the matching to the authentication device via the interface of the mobile storage device, wherein until the result of the matching of the biological information feature satisfies a condition decided in advance, the processing unit of the authentication device repeats, for every biological information feature, sending the command, extracting the biological information feature, sending the extracted biological information feature, and receiving the result of the matching of the biological information feature, and wherein until the result of the matching of the biological information feature satisfies a condition decided in advance, the processing unit of the mobile storage device repeats, for every biological information feature, sending information for specifying the biological information feature, matching the biological information feature, and sending the result of the matching.