Put tinfoil over your head and you’re crazy, but if you put tinfoil around your car key fob, you’re a genius.
Turns out thieves can use devices that will amplify fob signals to cars or copy the code to get into a vehicle.
So why wrap your car key fob in foil? Well, your car waits for a signal from the fob and thieves can grab fob signals. But if your car key fob is wrapped in tinfoil it will decrease the signal.
Not only should you keep your car key fob in foil, you should do it at home, too. Toss your keys into an old coffee can to prevent someone from stealing your car key fob’s signal. (Find out more about smart door locks, keyless entry and Bluetooth devices at home and how to stay secure from hacking.)