| 摘要 |
PROBLEM TO BE SOLVED: To improve convenience and safety by permitting data transfer as needed concerning an IC card having two completely independent signal processing modules. SOLUTION: When it is necessary to transfer data from a contact circuit part 16 to a non-contact circuit part 13, the data of a transfer object axes enciphered by an enciphering part 162 in the contact circuit part 16, signature data ate applied by a signature processing part 163, and these data are stored in a shard memory 19. These data are read out by the non-contact circuit part 13 as them data reception destination, the signature is verified by a signature processing part 133, it is confirmed them data ate surely transferred from the contact circuit part 16, the original data are restored by deciphering data in an enciphering part 132, and these data are stored in a memory 135 and used for ordinary processing in the non-contact circuit part 13 later. |
