PASSIVE REMOTE KEYLESS ENTRY SYSTEM WITH LEVEL-BASED ANTI-THEFT FEATURE
First Claim
1. A method for preventing security breaches of passive remote keyless entry systems for a vehicle comprising the steps of transmitting a signal between a fob and the vehicle at a level which changes in a particular pattern and detecting at the receiving side anomalies in the pattern of the received signal.
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Accused Products
Abstract
Method for preventing security breaches via the two-thief method of attack of passive remote keyless entry systems for vehicles. The method involves the transmission of a signal between a fob and the vehicle, where the level of the signal changes in a particular pattern. At the receiving side, anomalies in the pattern of the received signal (e.g., levels, timing) are detected and used to detect attempts to mimic the signal.
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Citations
20 Claims
- 1. A method for preventing security breaches of passive remote keyless entry systems for a vehicle comprising the steps of transmitting a signal between a fob and the vehicle at a level which changes in a particular pattern and detecting at the receiving side anomalies in the pattern of the received signal.
- 15. A method for preventing security breaches of a passive remote keyless entry system for a vehicle comprising the steps of transmitting a signal from a fob to the vehicle at a level which changes in a particular pattern, receiving said signal at said vehicle, detecting deviations of the received signal from said particular pattern, and performing a vehicle function only if said deviations are within acceptable limits.
Specification