A method and system for detecting if a relay is present in a PEPS system for a vehicle is provided which includes (a) transmitting LF signals from antennas associated with a vehicle to a key fob using a 3D LF receiver to measure the LF signal level on the x, y and z-axes; (b) selecting two or more parallel antennas associated with the vehicle that are orthogonal to the antenna at the PEPS triggering location; (c) normalizing the x, y and z vectors that are measured by the key fob for the selected two or more parallel antennas associated with the vehicle; and (d) determining if the normalized x, y and z vectors for the selected two or more parallel antennas associated with the vehicle are within a predefined range.

A method of controlling a smart key, including a low frequency (LF) receiver receiving an LF signal from a vehicle, a radio frequency (RF) transmitter transmitting an RF signal to the vehicle in response to the LF signal, a sensor unit sensing a motion, and a micro control unit controlling operations of the LF receiver, the RF transmitter, and the sensor unit, includes receiving, by the LF receiver, the LF signal from the vehicle and controlling, by the micro control unit, a turn-on/off operation of each of the LF receiver, the RF transmitter, and the sensor unit on the basis of the received LF signal.

Vehicles and methods are disclosed for enabling low power security checks to be performed on attempted access to a vehicle. An example vehicle includes a communication system having a low frequency antenna for communication with a vehicle unlocking device and a processor. The processor is configured to vary a gain in a low frequency signal transmitted to the vehicle unlocking device via the communication system, determine, based on a response from the vehicle unlocking device, that the vehicle unlocking device is a suspected attack device, responsively perform a security check on the vehicle unlocking device, and transmit an alert based on the security check.

A communication device mounted at a vehicle, the communication device including: a blocking section that, in a case in which communication with a second mobile device that is different from a first mobile device that transmits key information for the vehicle is interrupted, performs a blocking process to block an unlocking of the vehicle or a starting of the vehicle that is performed based on received key information.

There is provided a method and a system for authorizing a user device to send a request to a vehicle in order to prevent a physical layer relay attack. The system comprises a vehicle comprising an acoustic transducer and an RF transceiver and a user device comprising an acoustic transducer and an RF transceiver. The method relates to a signaling scheme using a combination of acoustic and RF signals for preventing a successful physical layer relay attack.

An actuation system used to actuate two buttons on a remote control device, such as a key fob, based upon commands that are generated from a mobile device. The actuation system includes an outer housing that defines an isolation enclosure. The actuation system includes a support frame that allows the vertical position of the button actuator to be manually adjusted. The lateral and longitudinal position of the actuator can also be manually adjusted, as can the distance between a pair of actuator tips. The controller receives the command signals from the mobile device and converts the command signals into actuation commands that are used to activate a servo motor to move the one of two actuation tips into contact with one of the buttons of the key fob. The system includes a RF receiver and transmitter to communicate a vehicle command signal for receipt by the vehicle.

Vehicles and methods are disclosed for enabling low power security checks to be performed on attempted access to a vehicle. An example vehicle includes a communication system having a low frequency antenna for communication with a vehicle unlocking device and a processor. The processor is configured to vary a gain in a low frequency signal transmitted to the vehicle unlocking device via the communication system, determine, based on a response from the vehicle unlocking device, that the vehicle unlocking device is a suspected attack device, responsively perform a security check on the vehicle unlocking device, and transmit an alert based on the security check.

A remote keyless entry system includes an in-vehicle device including an in-vehicle device controller, an in-vehicle device transmitter that transmits an in-vehicle device signal, and an in-vehicle device receiver that receives a portable device signal, and a portable device including a portable device controller, an acceleration sensor, a portable device receiver, and a portable device transmitter, wherein the portable device controller calculates a distance from the in-vehicle device to the portable device based on the in-vehicle device signal, calculates a first travel distance based on acceleration, and causes the portable device transmitter to transmit the portable device signal including at least the distance, the in-vehicle device controller receives the portable device signal multiple times and calculates a second travel distance based on distances included in received portable device signals, and whether a relay attack is performed is determined based on the first travel distance and the second travel distance.

System and techniques for a secure wireless lock-actuation exchange are described herein. After receiving a request to actuate a lock from a device, a controller can calculate a challenge counter and then perform verification iterations until an end condition is metwhich is a failure of a verification iterations or the number of iterations reaches the challenge count. If the verification iterations reach the challenge count (e.g., there are no failed iterations), then the controller actuates the lock. Each iteration includes an exchange between the device and the controller that the device validates by signing a message with a private key shared by the device and the controller. The exchange also includes a freshness value integrated into the device validation to prevent replay attacks.

The invention relates to automobile transport, specifically, to car protection (security) systems, and provides a method and a system for a safe remote engine start in guarded cars protected against unauthorized use, in case of a car being equipped with an in-built immobilizer. The car immobilizer bypass system comprises two devices, one of them being a key bypass module (4) containing transceiver modules (4.2) and (4.4) controlled by controller (4.1), and the other, a frequency converter (4.3). The transceiver module (4.2) interchanges data with transceiver module (2.1) of the car's security system (2) on preset communication frequency F corresponding to the frequency of data interchange with the transponder. The frequency converter (4.3) is designed with an option of two-way conversion of interchange signals from transceiver module (4.2) to module (4.4) from frequency F to frequency f, and in reverse. The system includes a remote start control device (5) comprising transceiver modules (5.2) and (5.4) controlled by controller (5.1), and a frequency converter (5.3). Module (5.2) ensures data interchange with module (4.4) on frequency f, and the frequency converter (5.3) is designed with an option of two-way conversion of interchange signals from transceiver module (5.2) to module (5.4) from frequency f to frequency F, and in reverse. Module (5.4) provides for the option of data interchange with transponder (1.1) on frequency F. The system allows to perform a remote engine start while enhancing the system of protection against unauthorized use and preserving all the original functions of the car's security system.