How Criminals Steal Cars Using Signal Relay Attacks and How to Stop Them > 자유게시판 샤핑몬

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Relay attacks have become a preferred tactic used by criminals to bypass modern car security systems without physically breaking into the vehicle. Thieves hijack the radio signal exchanged between the key fob and the vehicle, allowing thieves to unlock and start the vehicle even when the key is inside a house or pocket. The mechanism relies on capturing and retransmitting the key’s signal — criminals use two devices: one placed near the key fob to capture its low-power radio signal, and a second device near the vehicle that mimics the key’s presence. The immobilizer is tricked into believing the genuine key is present, granting full access.

This vulnerability exists because many keyless entry and start systems are designed for convenience, prioritizing seamless access over robust security. The key fob continuously emits a low-frequency signal that can be picked up even through walls or closed doors, making it possible for attackers to capture the signal from a distance of several meters. The theft can be executed in under 10 seconds, leaving no visible signs of forced entry. The crime often goes unnoticed until the car is already gone, with no broken windows or damaged locks to indicate tampering.

Combating this threat involves layered defenses combining tools and habits. One of the most effective methods is to store key fobs in Faraday bags or signal-blocking containers when not in use. The lining reflects and absorbs key signals, 大阪 カーセキュリティ rendering them undetectable, effectively preventing unauthorized interception. Avoid placing the key near exterior walls or glass surfaces, especially in homes where the signal may be more easily accessible to external devices.

Manufacturers are increasingly addressing this vulnerability by introducing advanced security features such as UWB that calculates signal flight time to verify proximity, making relay attacks much more difficult. Some newer systems also include proximity verification that requires the key to be within a very short distance, typically less than a meter, to initiate unlocking or starting. Owners can use companion apps to track fob transmissions and receive alerts if an unauthorized signal is detected.

Supplemental physical protections are strongly recommended, such as steering column immobilizers or vehicle location trackers, which can deter theft even if the car is successfully unlocked. Keeping the car’s software up to date closes security gaps. Many drivers remain unaware of this silent threat, and awareness drives behavioral change.

Ultimately, while no security system is entirely foolproof, a multi-pronged approach offers the strongest protection. The most powerful shield is knowledge paired with consistent caution.