IC card and IC card system

Details IC card and IC card system IC card and IC card system

1995-09-22

1998-08-18

Hajec, Donald T.

Registers

Records

Conductive

235380, G06K 1906, G06K 500

Patent

active

057960925

ABSTRACT:
An IC card includes a first auxiliary read-only memory containing identification data and a second auxiliary read/write memory. Under control of a host system, a write operation is performed into both the first and second auxiliary memories and only the data in the second auxiliary memory is updated. The host system reads the data from each of the first and second auxiliary memories and a data matching block in the host system checks each of the data against the data in a memory in the host system. Access to the main memory of the IC card is authorized only when the checking results in a match.

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patent: 5442165 (1995-08-01), Atsumi et al.
patent: 5444222 (1995-08-01), Inoue
patent: 5506397 (1996-04-01), Hoshino
patent: 5579502 (1996-11-01), Konishi et al.

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