MOBILE TERMINAL DEVICE, AUTHENTICATION SYSTEM, AUTHENTICATION METHOD, PROGRAM, AND INTEGRATED CIRCUIT

摘要

A mobile terminal device which a user carries includes: an entry determining unit for determining entry of the mobile terminal device in a residential area; an authentication information storage unit for storing authentication information indicating multiple authentication actions performed by the user carrying the mobile terminal device and an authentication order indicating an order of the authentication actions to be performed; an authentication processing unit for processing for authentication of the user by determining, based on the authentication information, whether or not the user has performed the authentication actions in the authentication order after the mobile terminal device enters the residential area; and an alarm processing unit for indicating a failure of the authentication when the result of the processing for the authentication is the failure.