CaroKann writes: Wireless keyfobs, which enable you to unlock or start your car by pressing a button, are commonplace these days. Newer keyfobs work simply by being close to the vehicles. As it turns out, with a radio relay system setup, these proximity keyfobs make entering and stealing vehicles relatively easy. Researchers at ETH Zurich were able to beat the keyfob systems from 8 different manufacturers. In one possible scenario, crook number one follows a car owner into a store. Standing a few aisles away, he picks up the signal given off by the victims keyfob, transmitting it to crook number two, who is near the victim's car. Crook number two relays the signal to the car, which then unlocks. With push button startup, it's then a snap to drive away.