The convenience of a keyless car is undeniable, but it comes with a critical security risk: the relay attack. This modern form of vehicle theft has led to a surge in auto crime worldwide, often bypassing traditional security systems and leaving owners vulnerable. The question is no longer “Do I have an alarm?” but rather, “Is my key fob’s signal protected?”

What is a Relay Attack and Why is Your Fob Vulnerable?

A relay attack is a simple but highly effective method used by thieves to steal a car without ever touching the physical key.

  1. Signal Interception: Two thieves work together. One positions themselves near your key fob (often outside your front door or window) with a signal amplification device.
  2. Signal Relay: This device captures the faint radio frequency (RF) signal constantly emitted by your key fob and relays it to a second device held by an accomplice near your car.
  3. Theft: The car is tricked into thinking the key is physically present, so it unlocks the doors and allows the thieves to start the engine and drive away—all in a matter of minutes, and without triggering a traditional alarm.

The Digital Shield: MoboKey’s Multi-Layered Defense

Digital keys, especially those designed by aftermarket innovators like MoboKey, are built to eliminate the vulnerabilities of the continuously broadcasting key fob. MoboKey transforms your smartphone into a digital shield, using a multi-layered approach to security:

  1. Encrypted Communication: MoboKey’s system does not rely on traditional, vulnerable RF signals. It uses AES-encrypted communication over Bluetooth. This makes it extremely difficult for hackers to intercept or manipulate the signal, effectively protecting against sophisticated hacking attempts.
  2. No Continuous Broadcast: Since MoboKey relies on a connected smartphone app for authorization, it does not broadcast a signal continuously like many older key fobs, significantly minimizing the window of opportunity for signal interception.
  3. Active Immobilization (Remote Kill Switch): If a theft attempt or unauthorized movement is detected, you have the ultimate weapon: the remote engine kill switch. You can remotely cut the engine’s power, actively immobilizing the car and preventing the theft before it progresses further.
  4. Instant Revocation: If your smartphone is lost or stolen, you can instantly log in from another device and remotely revoke access to the digital key. This ensures a lost phone does not grant permanent access to your vehicle.

Protecting Your Vehicle: Beyond the Fob

Security experts agree that the best defense is a multi-layered approach. If you still use a traditional key fob, you must protect its signal.

Defense Layer Solution MoboKey Advantage
Signal Blocking Store your fob in a Faraday pouch or metal box when at home. Does not rely on a constantly broadcasting key for secure access.
Physical Deterrent Use a steering wheel lock; it provides a visual deterrent to thieves. Complements physical security with digital security and a remote kill switch.
Digital Control Enable PIN-to-drive features if your car supports them. Provides remote access revocation, encrypted access, and engine immobilization.

MoboKey offers a comprehensive solution that combines active security, remote control, and peace of mind. By making the switch to a smartphone-based digital key, you are choosing a system built to defeat the modern threat of key fob hacking.

Ready to secure your car with the latest anti-theft system? Explore the MoboKey solution here: MoboKey PRO.