Patent ID: 8782758

Claim:
A biometric authentication system comprising: a biometric authentication server computer; and a plurality of client computers that are coupled through a network and configured to process an authentication request from a user of a client computer, wherein the biometric authentication server computer is configured to determine a cache target user, wherein the cache target user is another user who is different from the user who requested the authentication to the biometric authentication server computer; generate an identifier that indicates the cache target user; transmit biometric data of the cache target user and the identifier to the client computer of the user who requested the authentication; determine whether biometric data of any cache target user with a corresponding identifier are available on any client computers; measure a number of client computers that performed an authentication request to the biometric authentication server; and determine the cache target user when the number of client computers measured by the measurement unit exceeds a certain number of client computers; and wherein the client computer is configured to cache the biometric data of the cache target user and the identifier that are received from the biometric authentication server computer.