Key and lock device

Details Key and lock device Key and lock device

E - Fixed Constructions

05

B

E05B 49/00 (2006.01) G07C 9/00 (2006.01)

Patent

CA 2371179

A key and lock devices comprises a key (10) having a first electronic circuitry (14) and a lock (20) having a second electronic circuitry (24). The key and the lock store secret information, some of which is unique for each device. The key and the lock exchange a random number through connectors (15, 25) and perform a calculation in the respective circuitry based on the random number and secret information. An electrical blocking mechanism (40) is moved to a non-blocking position if a comparison of the calculations in the circuits give an expected result.

Cette invention concerne un dispositif à clé et verrou qui comprend une clé (10) dotée d'un premier circuit électronique (14) et un verrou (20) doté d'un second circuit électronique (24). Clé et verrou renferment des informations secrètes, dont certaines propres à chaque dispositif. La clé et le verrou échangent un nombre aléatoire par l'intermédiaire de connecteurs (15, 25) et exécutent un calcul dans leur circuit respectif à partir dudit nombre aléatoire et de l'information secrète. Un mécanisme de blocage électrique (40) passe sur une position de non-blocage si la comparaison entre les calculs effectués par les circuits est conforme au résultat escompté.

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