Method to provide warning to relay attacks on keyless entry and start systems
First Claim
1. A method of authentication for a vehicle equipped with a passive keyless entry and start (PKES) system that includes a network access device (NAD) configured to communicate with a key fob and a mobile device, comprising:
- sending a request for unlock or ignition start from the key fob to the NAD;
sending a first challenge signal from the NAD to the key fob;
determining if the key fob is within range of the NAD based on the first challenge;
sending a second challenge signal from the NAD to the mobile device;
determining if the mobile device is within range of the NAD based on the second challenge; and
sending a warning to the mobile device when at least the mobile device is not within range of the NAD.
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Accused Products
Abstract
A method and apparatus are presented for authenticating a vehicle equipped with a passive keyless entry and start system. The method includes sending a request for unlock or ignition start from the key fob to a vehicle'"'"'s network access device (NAD), sending a first challenge signal from the NAD to the key fob, determining if the key fob is within range of the NAD, sending a second challenge signal from the NAD to the mobile device, determining if the mobile device is within range of the NAD, and sending a warning to the mobile device when the key fob or mobile device is not within range of the NAD.
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Citations
14 Claims
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1. A method of authentication for a vehicle equipped with a passive keyless entry and start (PKES) system that includes a network access device (NAD) configured to communicate with a key fob and a mobile device, comprising:
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sending a request for unlock or ignition start from the key fob to the NAD; sending a first challenge signal from the NAD to the key fob; determining if the key fob is within range of the NAD based on the first challenge; sending a second challenge signal from the NAD to the mobile device; determining if the mobile device is within range of the NAD based on the second challenge; and sending a warning to the mobile device when at least the mobile device is not within range of the NAD. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for notification of theft of a vehicle, the apparatus comprising:
circuitry configured to; receive a request from a key fob for unlock or ignition start of the vehicle; transmit a first challenge signal to the key fob in response to the request; receive a response from the key fob based on the first challenge signal; determine if the key fob is within range of the vehicle based on a response to the first challenge signal from the key fob; transmit a second challenge signal to a mobile device; receive a response from the mobile device based on the second challenge signal; determine if the mobile device is within range of the vehicle based on a response to the second challenge signal from the mobile device; and transmit a warning to the mobile device when at least the mobile device is not within range of the vehicle.
Specification