IC CARD PROCESSOR, IC CARD, IC CARD PROCESSING SYSTEM AND IC CARD PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent the leak of information concerning an issuing command and to attain improvement in the security of an IC card concerning issuing processing by hiding the telegraphic message of the issuing command to an issuing object card with a means such as enciphering. ;SOLUTION: A control part 5 has an enciphering function for enciphering the telegraphic message of a command while using a production number (card peculiar information) supplied from an IC card 4 as a cryptographic key. At the time of card production, all the IC cards 4 have the same decoding logic and decoding key and on the side of a personal computer(PC) 1 for transmitting the telegraphic message of the command to the IC card 4, the correspondent encoding logic and cryptographic key are provided as well. Namely, in primary issuing processing, the same decoding logic (program) and key (decoding key) are used for all the IC cards 4 in order to create a file common for each system. In this case, the telegraphic message of the enciphered command gets equal for all the IC cards 4 but a 'command' in naked state can be hidden at least.;COPYRIGHT: (C)2000,JPO