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Difficulty: HardVehicle Security and Anti-Theft

A vehicle equipped with a standard factory-fitted electronic engine immobiliser is fully protected against relay attacks when the keyless entry smart fob is stored unprotected inside a nearby house.

Answer: Answer

Answer

False
The statement is false because relay theft intercepts and magnifies the wireless signal from an unprotected key fob inside a property. When this amplified signal reaches the car, the electronic immobiliser and keyless entry system recognize it as the genuine key, unlocking the doors and allowing the engine to start.

Step-by-Step Solution

1
Analyze how an electronic engine immobiliser verifies authorization
An immobiliser enables the engine to start once it receives the matching cryptographic transponder code from the paired smart key.
Understanding the wireless authentication process is necessary to evaluate potential system bypasses.
2
Examine how relay attack theft functions against keyless systems
Relay devices capture and boost the genuine radio signal between the vehicle and a key fob stored inside a nearby building.
Determines whether an immobiliser receives the valid signal required to permit operation.
3
Assess whether the immobiliser prevents vehicle theft during a relay attack
Because the authentic signal is relayed, the immobiliser recognizes the key as authorized and disarms, allowing the vehicle to be unlocked and driven away.
Concludes that a standard factory immobiliser alone does not protect against relay theft without physical signal-blocking measures.

Key Concept

Keyless entry vulnerability and electronic immobiliser limitations during relay attacks
Estimated Time:1m 0s
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Topics

Vehicle Security and Anti-Theft

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