Patent ID: 7091826

Claim:
A user authentication system for conducting user authentication by using a user's biometric information, comprising: a user terminal and an authentication server connected to each other on a network, the authentication server comprising a biometric information registration part for obtaining the user's biometric information from the user terminal and registering the user's biometric information, a processing part allowing authentication software associated with the biometric information to have identification information capable of uniquely specifying the user or the user terminal requesting authentication, the authentication software allowing the user terminal to notify the user of a request for the user's input of biometric information and to send the inputted biometric information to the authentication server, an authentication software transmission part for sending the authentication software to the user terminal after the user has completed registration of biometric information to the biometric information registration part, and an authentication processing part for conducting user authentication upon receiving a request for user authentication by receiving the user's biometric information sent from the user terminal and the identification information of the authentication software, and obtaining a biometric information corresponding to the received identification information from the biometric information registration part, and comparing the biometric information corresponding to the received identification with the received biometric information; and the user terminal comprising a receiving part for receiving the authentication software sent from the authentication server, a memory for storing the received authentication software, a device for notifying the user of a request for the user's input of biometric information under a control of the authentication software stored in the memory, an input part for obtaining the biometric information inputted by the user, and a transmission part for sending an authentication request containing the biometric information inputted through the input part and the identification information of the authentication software to the authentication server under a control of the authentication software stored in the memory.