But for less than $100, criminals can get an amplifier that detects key fob signals from up to 300 feet away and then transmits them to your car. In other words, your keys could be in your house, and criminals could walk up to your car and open it. There are some simple steps you can take to keep hackers from stealing your signal. You can buy a signal-blocking pouch that can hold your keys, like the Hack-Blocking Card Pouch.
Or, you can stick your key fob into the refrigerator or freezer. The multiple layers of metal will block your key fob’s signal. Just check with the fob’s manufacturer to make sure that freezing your key fob won’t damage it.
If you’re not hot on freezing your key fob, you can do the same thing with your microwave oven. (Hint: Don’t turn it on.) Stick your key fob in there, and criminals won’t be able to pick up its signal.
Since your key fob’s signal is blocked by metal, you can also wrap it up in aluminum foil. While that’s the easiest solution, it can also leak the signal if you don’t do it right. Plus, you might need to stock up on foil. You can also make a foil-lined box to put your keys in if you’re in a crafting mood.
Its a good idea to explore the line of stylish RFID-blocking wallets, purses and passport cases.