Patent ID: 6538557
Filing Date: 2003-03-25
Classification: B60R,E05B,G07C

Abstract:
A device for securing a rotor vehicle against unauthorized use, wherein a plurality of keys are issued for the motor vehicle, comprising:a receiver mounted in a motor vehicle for directly receiving signals from a central office; a control unit disposed in the motor vehicle for storing use authorization information received by said receiver from the central office; and at least some vehicle keys issued for the motor vehicle being assigned an identifier different from identifiers assigned to the other vehicle keys, and said control unit being programmed to: query the identifier of a respective vehicle key upon an activation thereof; determine if a key authorization is present in said control unit for the respective vehicle key; determine if a use authorization is present in said control unit for the respective vehicle key only after it has been determined that a key authorization is present in said control unit for the respective vehicle key; and release a function requested by the corresponding key only when use authorization is present in said control unit.