You may have seen a Facebook post making the rounds about car thieves breaking into cars by mimicking your key fob. It isn’t a hoax, and police say they have evidence.

That also cues thieves, who can intercept the radio frequency from your key fob and copy your code. Devices used for this attack are sold for only a few hundred dollars, along with key fobs that ...

You assume your vehicle is secure. But what if thieves could bypass your car's security system without even triggering the alarm? It's a growing concern known as "relay attack" or key fob cloning.

While many car keys require a trip to the dealership and some cash to duplicate them, others are much easier. You can even ...

Thieves amplify a vehicle's radio signal to access and copy the key fob signal to steal a vehicle. Here's how to block the signal.

Your key fob emits an RFID signal that unlocks the car. By cloning it, the device makes the car’s anti-theft system think your key fob is next to it.

The mechanism that works between the key fob and the vehicle is based on pairing," Shlisel said. "You can connect it to your iPhone via Bluetooth, right? This is called pairing devices.