CONTROLLER

摘要

A controller reads data from a mutually authenticated recording medium or writes data on the recording medium. The controller is provided with an interface section, which is an interface to the recording medium; a storage section for storing key data and authentication information generated at the time of authentication; and a control section for controlling power supply corresponding to whether the controller reads or writes data from or on the recording medium. While the controller does not reading nor writing data from or on the recording medium, the control section controls power to be supplied only to the storage section. Thus, the controller can reduce the number of times of mutual authentication with the recording medium and reduce power consumption at the same time.