Patent 10997811 was granted and assigned to Denso on May, 2021 by the United States Patent and Trademark Office.
An authentication system includes a portable terminal carried by a user, a controller that authenticates the portable terminal, and a human detection portion that is configured to detect a person existing within a predetermined detection range. The portable terminal includes a terminal-side communication portion that communicates with the controller and transmits an authentication request signal, which requests authentication of the portable terminal. The controller performs a normal-time notification process that notifies a message in which the portable terminal is authenticated, in response to that a predetermined operation is performed on an operation area after the portable terminal has been authenticated in a authentication process.