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Method and system for authenticating vehicle equipped with passive keyless system

  • US 9,710,983 B2
  • Filed: 01/29/2015
  • Issued: 07/18/2017
  • Est. Priority Date: 01/29/2015
  • Status: Active Grant
First Claim
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1. A method for authenticating a vehicle equipped with a passive keyless system that includes a vehicle module configured to communicate with a portable keyfob, the method comprising the steps of:

  • sending one or more initial challenge signal(s) from the vehicle module to the portable keyfob in response to a passive keyless start attempt of the vehicle, the initial challenge signal(s) being sent before a successful passive keyless start of the vehicle;

    sending one or more secondary challenge signal(s) from the vehicle module to the portable keyfob after a successful passive keyless start of the vehicle and in response to a trigger event indicating that the vehicle has moved a particular distance from a location of the vehicle where the successful passive keyless start occurred, the secondary challenge signal(s) being sent to determine whether the portable keyfob is in the vehicle after the trigger event;

    initiating an active authentication to confirm the presence of an authorized driver in the vehicle when a valid response to the secondary challenge signal(s) is not received by the vehicle module; and

    performing one or more remedial action(s) if a valid response to the active authentication is not received;

    wherein the trigger event includes one or more of the following conditions;

    a) a vehicle odometer increments by a predefined amount and an accumulation of the increments is less than a maximum threshold;

    b) a distance delta acquired from a GPS module is greater than a predefined GPS delta threshold and the distance delta is less than a maximum GPS delta;

    orc) a speed of the vehicle is greater than a minimum speed threshold and a timer value is less than a maximum timer value.

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