Chip card including tamper-proof security features

Details Chip card including tamper-proof security features Chip card including tamper-proof security features

2008-05-20

2008-05-20

Le, Thien M. (Department: 2887)

Registers

Records

Conductive

C235S380000

Reexamination Certificate

active

07374098

ABSTRACT:
The chip card comprises a card body (10) and a chip module (12) embedded in the card body and incorporating an integrated circuit. The card body includes at least one security feature (20, 22) incorporated in a layer, or applied on a surface, of the card body. An additional tamper-detection layer (26) is provided including a conductive pattern (28) forming an electrical loop connected between terminals of the integrated circuit, said conductive pattern having at least one region located beneath or above said security feature (20, 22). The integrated circuit is adapted to perform an integrity check of said conductive pattern for conditionally performing further operations only in case said integrity is recognized.

REFERENCES:
patent: 3699311 (1972-10-01), Dunbar
patent: 6068192 (2000-05-01), McCabe et al.
patent: 6079621 (2000-06-01), Vardanyan et al.
patent: 6095416 (2000-08-01), Grant et al.
patent: 6491215 (2002-12-01), Irwin et al.
patent: 6702185 (2004-03-01), Zercher
patent: 2 740 887 (1997-05-01), None
patent: WO 97/22086 (1997-06-01), None
International Search Report dated Oct. 12, 2004 (3 pages).

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