High-security IC card

Details High-security IC card High-security IC card

1994-07-27

1997-01-07

Beausoliel, Jr., Robert W.

Registers

Coded record sensors

Particular sensor structure

235379, G06F 1134

Patent

active

055926193

ABSTRACT:
An IC card device includes a card base, at least one integrated circuit disposed on the card base, and communication circuitry disposed on the card base and coupled to the at least one integrated circuit, for transferring signals between the at least one integrated circuit and an external device. The at least one integrated circuit includes a first reloadable memory having a command table area for storing command tables, a second read-only memory for storing a non-reloadable command table, and selecting circuitry, operatively coupled to the first memory and the second memory, for selecting either the non-reloadable command table stored in the second memory or a command table stored in the command table area of the first memory. The command table of the first memory and the command table of the second memory store command class designations which designate the class of each of the commands, and store command code designations which designate the operation corresponding to each of the commands.

REFERENCES:
patent: 4734568 (1988-03-01), Watanabe
patent: 4748320 (1988-05-01), Yorimoto et al.
patent: 4758718 (1988-07-01), Fujisaki et al.
patent: 4908038 (1990-03-01), Matsumura et al.
patent: 5206938 (1993-04-01), Fujioka
patent: 5276903 (1994-01-01), Shinagawa
patent: 5286962 (1994-02-01), Fujioka et al.
patent: 5355413 (1994-10-01), Ohno

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