AUTHENTICATION SYSTEM, AUTHENTICATION METHOD AND NON-TRANSITORY COMPUTER READABLE STORAGE MEDIUM

An authentication control includes a connection authentication and an operation authentication for an authentication target device using a mobile terminal and a communication device that receives a signal from the mobile terminal toward the authentication target device. Information received by a reception unit in the mobile terminal and information detected by a state sensor for detecting a state of the mobile terminal are acquired. A connection response signal is transmitted from a transmission unit in the mobile terminal when the state of the mobile terminal satisfies a permission condition. A state determination for determining the state of the mobile terminal is performed after the reception unit receives the connection request signal.