Patent attributes
A communication system includes an object communication unit provided in a controlled object, a portable machine having an identification code registered in the controlled object, the portable machine including a portable machine communication unit conducting wireless communications with the object communication unit, and a portable terminal including a portable terminal communication unit conducting wireless communications with the object communication unit and the portable machine communication unit. The controlled object includes a communication identification code generation unit generating a communication identification code at predetermined timing, the communication identification code being necessary for the portable terminal to control the controlled object, the communication identification code differing for every generation, an authentication unit authenticating a signal containing a control description which the object communication unit receives from the portable terminal communication unit; and an object control unit controlling the controlled object, based on the control description acquired from the authentication unit.
