G - Physics – 11 – C
Patent
G - Physics
11
C
352/82
G11C 11/34 (2006.01) G06K 19/073 (2006.01)
Patent
CA 2021004
The chip card is such that at least one stress sensor indicator (C1, C2, C3) is placed on the chip (10), under a known stress condition and is preserved in this condition by a protective coating applied over the chip as long as this coating is not affected. The chip has the capability to measure an electrical value characteristic of the stress, and a logic circuit connected to the measurement capability for detecting changes in the stress condition indicating an intrusion on the card.
ABREGE CARTE A MICROCIRCUIT PROTEGEE CONTRE L'INTRUSION La carte à microcircuit est telle qu'au moins un capteur indicateur de contrainte (C1, C2, C3) est placé sur le microcircuit (10), dans un état de contrainte connu et est maintenu dans cet état par une couche de protection déposée sur le microcircuit tant que cette couche n'est pas affectée. Le microcircuit comporte des moyens de mesure d'une grandeur électrique caractéristique de la contrainte, et un circuit logique relié aux moyens de mesure pour détecter les changements d'état de contrainte indiquant une intrusion sur la carte. Fig 1.
Avenier Jean-Pierre
Kowalski Jacek
Lisimaque Gilles
Maes Philippe
Gemplus Card International
Goudreau Gage Dubuc
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