System and method for authenticating content user

摘要

A system for authenticating a content user, comprising a group common key that authenticates a user, a private key owned by the user, a trusted organization adapted to create and distribute the group common key, and to store personal information on the authenticated user and a temporary registration certificate issued to the authenticated user. A user apparatus converts the temporary registration certificate by means of a predetermined conversion method using the private key, and further provides the converted temporary registration certificate to a content provider prior to executing content provided by the content provider the content provider adapted to check whether the user has been authenticated by the trusted organization, using the group common key prior to providing the content.