Car Relay Attack: Anti-Theft Guide

In the realm of modern automotive security, understanding and countering car relay attacks is a critical aspect of personal asset security. This form of electronic subterfuge has emerged as a prevalent method among criminals and adversaries, exploiting the technological advancements in vehicle keyless entry systems.

Just as operatives in the field must be adept at adapting their strategies to evolving threats, car owners must now arm themselves with the knowledge and tools to defend against these sophisticated attacks at home or wherever you park.

          Mechanics of a Relay Attack

A relay attack, a tactic often employed by criminals and adversaries, is a sophisticated method of vehicle theft that exploits the keyless entry systems of modern cars. This technique leverages the convenience features of these systems, which are designed to unlock and start a car when the key fob is in close proximity, without any physical interaction.

In a relay attack, the perpetrator uses a specialized device to capture and relay the signal from a car’s key fob, often from within the owner’s home, to another device near the car. This process tricks the car into believing that the key fob is close by, allowing the attacker to disarm the alarm, unlock the vehicle and, in many cases, start the engine and drive away – all within seconds.

In theory, a relay attack can be accomplished as long as a vehicle’s key fob is within a certain range to its vehicle; for example, the car owner’s keys hanging on a wall by the door of his house with his car parked on the street.

          Prevention and Defense Methods

Awareness and Vigilance

• Understand the Risk:   Recognize that high-tech vehicle thefts like relay attacks are a real and growing threat.

• Stay Informed:   Keep abreast of the latest security updates and advisories for your vehicle.

Secure Key Fob Storage

• Faraday Pouches:   Use signal-blocking pouches, also known as Faraday bags, to store key fobs when not in use. These pouches prevent the fob’s signals from being intercepted and cloned.

• Strategic Placement:   Avoid leaving key fobs near doors or windows. Store them in a central location, as far away from the vehicle as possible.

Technological Countermeasures

• Software Updates:   Regularly update the software of your vehicle if such updates are provided by the manufacturer. These updates may include security enhancements.

• Aftermarket Solutions:   Consider installing aftermarket security systems that offer enhanced protection against relay attacks.

Physical Deterrents

• Steering Wheel Locks:   Use mechanical devices like steering wheel locks. They serve as a visible deterrent and an additional layer of security.

• Car Alarms:   Ensure your vehicle is equipped with a loud alarm system that triggers upon unauthorized entry.

Reducing Signal Footprint

• Key Fob Deactivation:   Some key fobs have a deactivation or sleep mode that can be engaged when not in use, significantly reducing the risk of relay attacks.

• Manual Locking:   Consider using the manual lock button on your key fob or the physical key to lock your vehicle, bypassing the wireless signal.

Environmental Considerations

• Secure Parking:   Whenever possible, park in well-lit, secure areas or private garages to reduce exposure to potential attackers.

• Surveillance:   Utilize CCTV or home security systems to monitor the area where your vehicle is parked.

Community Awareness

• Neighborhood Watch:   Engage in or establish a neighborhood watch program to monitor suspicious activities.

Relay attacks represent a modern challenge in vehicle security, requiring a combination of awareness, technological savvy, and proactive measures. By adopting these strategies, individuals can significantly reduce the risk of becoming victims of such sophisticated theft techniques.

The key to effective defense against relay attacks lies in a layered approach, combining multiple methods to create a formidable barrier against potential threats. Stay vigilant, stay informed, and prioritize your vehicle’s security to outsmart and counter these high-tech attacks.