In a registered card issuing information supply device 131, the registered card issuing information is encrypted, and the encrypted registered card issuing information thus obtained is transmitted through a transmission medium 121 to a registered card issuing machine 101. In the registered card issuing machine 101, the encrypted registered card issuing information from the registered card issuing information supply device 131 is received and registered. When the registered card issuing machine 101 is allowed to communicate with the IC card 2, it transmits the encrypted registered card issuing information thus registered to the IC card 2. In the IC card 2, the encrypted registered card issuing information from the registered card issuing machine 101 is decoded, and the registered card issuing information thus obtained is stored.