US Patent 7924139 Wireless authentication method and wireless authentication system

A first communication device performs a first, a second, and a third authentication processing for a second communication device, a authentication station sends to the first communication device a confirmation signal indicating that a person's identity is confirmed, when the authentication station succeeds the authentication of the second communication device, so that the authentication station validates the cancellation of a usage restrictions of the controlled device imposed by the first communication device based on the cancellation permission signal.