Microcircuit card protected against intrusion

Details Microcircuit card protected against intrusion Microcircuit card protected against intrusion

1990-07-11

1991-10-22

Buczinski, Stephen C.

Cryptography

Cryptanalysis

206806, 235488, 235492, G11B 2328, G06K 1902

Patent

active

050602616

ABSTRACT:
The microcircuit card is such that at least one strain-indicating sensor is placed on the microcircuit, in a known state of strain, and is maintained in this state by a protection layer deposited on the microcircuit for as long as this layer is not affected. The microcircuit has means for measuring an electrical value that is characteristic of the strain, and a logic circuit connected to the measuring means to detect the changes in the condition of strain indicating an intrusion into the card.

REFERENCES:
patent: 4465901 (1984-08-01), Best
patent: 4691350 (1987-09-01), Kleijne et al.
patent: 4783801 (1988-11-01), Kaule
patent: 4811288 (1989-03-01), Kleijne et al.
patent: 4860351 (1989-08-01), Weingart

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