Importance

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Abstract

A composite IC card for controlling information of a plurality of different enterprises using an IC card in which a memory is divided into a plurality of storage areas and which has a code store section for storing a plurality of codes necessary to access the storage areas, a first code specify section for specifying a first code corresponding to each enterprise, a second code specify section for specifying a second code set according to the security level of each storage area, a code read section responsive to an instruction to access a desired storage areas from an external device for reading the first and second codes from the code store means, a code collate section for collating the externally inputted code with the code read by the code read section, and a section for allowing the access to the desired storage area thus instructed when all collations in the collate section result in a match.

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First Claim