摘要 |
According to an embodiment of the present invention, an IC card includes a communications unit, a generation unit, a first recording unit, and a removal unit. The communications unit receives and transmits data from and to an external device. The generation unit generates a session key in response to a command, received by the communications unit, for requesting generation of the session key. The first recording unit stores the session key generated by the generation unit. The removal unit which removes the session key if a retention period of the session key is over a threshold value. |