Authentication server, client terminal for authentication, biometrics authentication system, biometrics authentication method, and program for biometrics authentication

摘要

A template sharing processing is performed between a first authentication server 100 and a second authentication server 110. A client terminal 120 generates two parameter differences, one of which is sent to the first authentication server 100, and the other to the second authentication server 110. The first authentication server 110 transforms an already-registered template with the received parameter difference to create a temporary template and sends the temporary template to the second authentication server 110. The second authentication server 110 transforms the received temporary template with the already-received parameter difference to create and register therein a further transformed template. A storage medium stores therein only a single master key for generating a parameter.