The purpose of the present invention is to add a user restriction function with use of a card by a simple structure even with an inexpensive image forming apparatus. A CPU of an image forming apparatus determines a port of a signal acquired from a card R/W at the time of initialization of the connected IC card R/W. Then, the CPU of the image forming apparatus controls an execution or a stop of an application for performing authentication service processing corresponding to the port of the signal received from the card R/W.