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US 2006/0077042 A1Published application
Method for avoiding an unauthorized access to passive access-authorization system of a motor vehicle
OwnerAlexander Hockinventor
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Abstract
A method for avoiding an unauthorized access to a passive access-authorization system of a motor vehicle having a vehicle-side transceiver and a portable transponder. In case of a query signal having a first radio reach, transmitted from the transceiver to the transponder, a second radio reach of a response signal transmitted by the transponder to the vehicle-side transceiver, is reduced.
Claims6
A method for avoiding an unauthorized access to a passive access-authorization system of a motor vehicle having a vehicle-side transceiver and a portable transponder, the method comprising:
- in case of a query signal having a first radio reach, transmitted from the transceiver to the transponder, reducing a second radio reach of a response signal transmitted by the transponder to the transceiver.
Dependencies are inferred from the claim text.