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This clever trick will be especially appreciated by owners of new cars with keyless entry who live in family houses and have their own parking space.
A car key with a keyless unlocking system constantly transmits signals into the surroundings that only one specific car can decrypt. These signals can be detected by car thieves, decoded and mimicked to unlock your car. All they have to do is get close to the front door of the house, because most people keep their car keys right in the hallway.
How can foil help against theft?
When you wrap the car key in foil, you prevent these signals from spreading into the surroundings with high efficiency. It works so well that when you stand next to the car with the key in foil and try to unlock it, the car does not respond.
However, if you stand with the key next to the car, it will respond – this is because the foil significantly shortens the signal range, but not completely. So if you’re genuinely afraid your car might be stolen even though it has a security system, it’s simply to prevent thieves from carrying out the process they planned to steal your vehicle.
