The vehicle is tricked into believing the legitimate key is right next to it, allowing the doors to unlock and the engine to start. Popular Tools and the "Gray Market"

Stands near the vehicle with a relay transmitter. This device receives the boosted signal and re-broadcasts it to the car.

Stands near the owner’s home or person with a signal amplifier to capture the weak radio frequency (RF) signal constantly emitted by the key fob.

The Hidden Market: Understanding Relay Attack Devices and Keyless Security

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