Until recently, most modern keyless entry systems were susceptible to relay attacks, Billyeald said. However, many car manufacturers are working to get ahead of the problem. After all, tin foil has been proven to dampen your key fob's signal, but doesn't completely block it since the material lacks density.
Why would you wrap your locks in foil?
So, when you're out and about, here are two tips for protecting your keys. Because metal can block your key fob's signal, you can wrap it in aluminum foil. While that's the easiest solution, aluminum foil can leak the signal if you don't wrap it tightly.Jun 1, 2019
Does aluminum foil protect car keys?
After all, tin foil has been proven to dampen your key fob's signal, but doesn't completely block it since the material lacks density. “The easiest way to prevent this would be to invest in a small RFID-blocking bag,” McKenzie said.