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US 7,002,450 B2Granted
Method for authenticating a spare key for using a vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorRuediger Bartz
Life of this patent
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Abstract
In a method for authenticating a spare key for use with a vehicle in the absence of the regular key, the spare key is provided with an identification number that is transmitted to, and checked by, a central station. The spare key is authenticated by an authorization signal sent from the central station to the vehicle.
Claims11
A method for authenticating a spare vehicle key to be used with a vehicle in the absence of a regular key, the method comprising the acts of:
- providing the spare vehicle key with an identification number;
- transmitting said identification number to the vehicle and to a central station from a source other than from the vehicle;
- transmitting said identification number from the vehicle to the central station
- checking the transmitted identification number by the central station, wherein the central station compares the identification number transmitted from the source other than the vehicle with the identification number transmitted from the vehicle;
- and
- authenticating the spare vehicle key and sending an authorization signal from the central station directly to the vehicle.
3 more elements
Dependencies are inferred from the claim text.