IC card for prevention of fraudulent use

Details IC card for prevention of fraudulent use IC card for prevention of fraudulent use

1991-11-21

1994-02-15

Westin, Edward P.

Registers

Records

Conductive

235380, G06K 502, G06K 903

Patent

active

052869628

ABSTRACT:
Disclosed herein is an IC card provided with means for generating a first signal indicating execution to a test program and a logic circuit for receiving the first signal and a second signal for commanding data writing in the prescribed region of the memory. The logic circuit allows output of the second signal during execution of the test program, and inhibits such output of the second signal ween an application program is executed. The IC card is so structured that a prescribed region of a memory is brought into read-only state during execution of an application program so that the IC card is identified with read data, thereby preventing fraudulent use of the IC card.

REFERENCES:
patent: 4798941 (1989-01-01), Watanabe
patent: 4845717 (1989-07-01), Iijima
patent: 5146068 (1992-09-01), Ugawa et al.
patent: 5159183 (1992-10-01), Yamaguchi
Nikkei Electronics, No. 404, pp. 133-144, Sep. 22, 1986.

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