Circuit security

G - Physics – 06 – F

Patent

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Details

G06F 1/00 (2006.01) G08B 13/12 (2006.01)

Patent

CA 2543316

A secure device (1) has a circuit board (2) with various exposed components such as an LCD (4) and keys (40). A secure circuit (10) is housed within an enclosure formed between the board (2) and a cover (11). The cover (11) has, on its inside surface, a security track (23) in a dense serpentine pattern. The board (2) has a security track (52), also in a dense serpentine pattern, is an inner layer. The track (52) is linked to covered surface-level tracks (27) by vias (64). The cover's security track (23) is connected to the board's security tracks (52, 27) via a deformable pad (25) whose conductivity increases with applied compression.

L'invention concerne un dispositif sécurisé (1) possédant une carte de circuit imprimé (2) dotée de plusieurs composants exposés, tels que un affichage LCD (4) et des clés (40). Un circuit sécurisé (10) est logé à l'intérieur d'une enveloppe formée entre la carte (2) et un couvercle (11). Ledit couvercle (11) présente, sur sa surface interne, une piste de sécurité (23) dans un modèle de serpentin dense. Ladite carte (2) présente une piste de sécurité (52). Dans un modèle de serpentin dense, se trouve une couche interne. Ladite piste (52) est liée aux piste s de niveau de surface recouvertes (27) par des trous de raccordement (64). La piste de sécurité du couvercle (23) est connectée aux pistes de sécurité de la carte (52, 27) par un tampon déformable (25), dont la conductivité augmente avec l'application d'une compression.

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