| abstract |
(57) Abstract: The present invention relates to a storage capacity (for example, ROM) in an IC. And EERROM and RAM) are small, the IC performs many processes. The present invention relates to a flash memory chip (130). An IC card chip 150 capable of executing security processing (encryption, decryption, etc.), and a controller chip 12 for controlling access to the flash memory chip and the IC card chip in response to a request from the host 220 0, a part of the program and data of the IC card necessary for the security processing is stored in the flash memory chip, or the IC card chip requests the data processing using the flash memory chip and the host device. |