Modern car keys constantly transmit signals, making them vulnerable to theft—even without physical access. Thieves can buy a matching key and replicate your vehicle’s access code using cheap, widely available devices.
To prevent this, cybersecurity experts recommend wrapping your keys in aluminum foil. It creates a shield that blocks electromagnetic waves, preventing unauthorized access. While not perfect, it’s a simple and inexpensive solution.
A more effective option is a Faraday bag, which you can buy online for a few dollars. These pouches offer better insulation and prevent signal transmission.