KEYLESS REPEATERS

Keyless Repeaters: Professional Tools for Automotive Security Testing

A keyless repeater, often called a relay attack device, is specialized radio equipment that intercepts, amplifies, and retransmits the signal from a car key fob. This process extends the key's effective range, tricking the vehicle into believing the key is nearby, which can allow for unlocking and starting the engine from a distance.

How a Keyless Repeater Works
The device works by using two units. One unit captures the weak signal from a distant key fob, relays it to the second unit, which then amplifies and rebroadcasts it directly to the car. This signal amplification bypasses the proximity-based security of keyless entry systems, demonstrating a critical vulnerability known as a relay attack.

Legitimate Professional Applications
While associated with security risks, keyless repeaters have vital authorized uses:

• Security Vulnerability Testing: Automotive security experts use repeaters in controlled settings to test the resilience of keyless entry systems and identify weaknesses.

• RF System Diagnostics: Engineers use them to evaluate the effective range and performance of a vehicle's wireless communication system.

• Security Training & Education: These devices are crucial for training locksmiths and security professionals about modern vehicle theft techniques and countermeasures.

• R&D for Enhanced Security: Manufacturers use repeater testing to develop more secure systems with rolling codes and improved encryption to prevent real-world relay attacks.

Legal and Ethical Notice
The unauthorized use of a keyless repeater to gain access to a vehicle is illegal and constitutes a serious crime. These devices are strictly intended for use by licensed security researchers, automotive professionals, and other authorized entities in a legal and ethical manner for testing and educational purposes.