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Composite IC card

  • US 4,849,614 A
  • Filed: 12/18/1986
  • Issued: 07/18/1989
  • Est. Priority Date: 12/27/1985
  • Status: Expired due to Term
First Claim
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1. A composite IC card for a plurality of different kinds of information systems, including:

  • a control unit for receiving commands, designation codes from outside the IC card, said designation codes including first and second index codes, and for processing said commands and said designation codes from outside the IC card;

    a user storage area having a plurality of storage areas for storing information, said storage areas being classifiable into groups corresponding to different information systems and each storage area within one of said groups having a security level;

    means for storing enough of said designation codes to designate each of said storage areas as designated storage areas;

    first means for accessing one of said groups of said storage areas based on said first index code;

    second means for accessing at least one of said storage area within one of said groups of storage areas base on said second index code;

    first means for internally verifying said first code for said first accessing means;

    second means for internally verifying said second code for said second accessing means; and

    means for accessing said designated storage areas when said first accessing means verifies said first code and said second accessing means verifies said second code.

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