Relay attack prevention for passive entry passive start (PEPS) vehicle security systems
First Claim
1. A passive entry passive start (PEPS) vehicle security system configured to thwart a relay attack on the system, said system comprising:
- a first ultra wideband transceiver (UWBX) installed on a vehicle and configured to transmit a request pulse at a request time;
a mobile UWBX installed in a nomadic device and configured to transmit a reply pulse in response to the request pulse; and
a controller configured to determine a distance between the first UWBX and the mobile UWBX based on a first time interval between the request time and a first time that corresponds to when the reply pulse is received by the first UWBX, wherein the controller is further configured to unlock doors of the vehicle only if the distance is less than an unlock threshold.
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Accused Products
Abstract
A passive entry passive start (PEPS) vehicle security system configured to thwart a relay attack on the system. The system includes one or more ultra wideband transceivers (UWBX) installed on a vehicle and configured to transmit a request pulse at a request time. A mobile UWBX, possibly installed in a nomadic device such as a smart phone, is configured to transmit a reply pulse in response to the request pulse. A controller is configured to determine a distance between each UWBX and the mobile UWBX based on a time interval between the request time and a time that corresponds to when the reply pulse is received by the each UWBX. The controller may also be configured to unlock doors of the vehicle only if the distance is less than an unlock threshold.
77 Citations
13 Claims
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1. A passive entry passive start (PEPS) vehicle security system configured to thwart a relay attack on the system, said system comprising:
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a first ultra wideband transceiver (UWBX) installed on a vehicle and configured to transmit a request pulse at a request time; a mobile UWBX installed in a nomadic device and configured to transmit a reply pulse in response to the request pulse; and a controller configured to determine a distance between the first UWBX and the mobile UWBX based on a first time interval between the request time and a first time that corresponds to when the reply pulse is received by the first UWBX, wherein the controller is further configured to unlock doors of the vehicle only if the distance is less than an unlock threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A passive entry passive start (PEPS) vehicle security controller configured to thwart a relay attack on a PEPS system, said controller comprising:
a processor configured to operate one or more UWBXs to determine a distance between a first UWBX coupled to the controller and a mobile UWBX located apart from the controller, said distance based on a first time interval between a request time that corresponds to when the first UWBX transmits a request pulse at a request time, and a first time that corresponds to when a reply pulse is received by the first UWBX from the mobile UWBX, wherein the controller is further configured to unlock doors of the vehicle only if the distance is less than an unlock threshold. - View Dependent Claims (10, 11, 12, 13)
Specification