Tamper-proof card associating a high storage density information

Details Tamper-proof card associating a high storage density information Tamper-proof card associating a high storage density information

1991-03-29

1992-12-29

LaRoche, Eugene R.

Registers

Records

Conductive

235375, 235380, 235449, 235493, 34082534, G06K 1906, G06K 500, G07D 700

Patent

active

051754240

ABSTRACT:
The card has a plastic support bearing, on at least one part of its surface, a layer of recording material and a microcircuit inserted in the plastic support. The card is made tamper-proof by the setting up of an identifier code that is characteristic of the relationship between the microcircuit and the support bearing the recording layer. This code is, firstly, recorded in the memory of the microcircuit and, secondly, detectable by analysis of the support. Any detachment of the support and of the microcircuit in which the related code has been memorized prevents the checking of the two codes by coincidence. The invention can be applied notably to high storage density cards.

REFERENCES:
patent: 4682794 (1987-07-01), Margolin
patent: 4683372 (1987-07-01), Matsumoto
patent: 4684794 (1987-08-01), Bito
patent: 4697073 (1987-09-01), Hara
patent: 4701600 (1987-10-01), Beech et al.
patent: 4760245 (1988-07-01), Fukawa
patent: 4870574 (1989-09-01), Limisimaque
patent: 4874934 (1989-10-01), Nakahara et al.
patent: 4960982 (1990-10-01), Takahira

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