Keyless entry is one of the most convenient features of newer cars. Unfortunately, though, this user-friendly feature is also a favorite for car thieves. Security experts are warning of a relatively new scam centered on key fobs. In this scam, thieves use a simple device to pick up the signal from a vehicle’s key fob and use it to steal the car. Here’s what you need to know about this scam and to learn how to protect your vehicle.