If you use your smartphone to unlock the doors of a Tesla car

The device, as well as the car, transmit Bluetooth signals to gauge their distance to one another.

Get near the car using the phone in your hand and the door will automatically unlock.

The proximity authentication system works in the assumption

That the keys stored on the phone is able to be transferred when the handset is inside Bluetooth distance.

A researcher has come up with a method that can unlock millions of Teslas, as well as a multitude of other devices

The device that authenticates the phone or fob are hundreds of miles or yards away.

The attack is based on weaknesses in Bluetooth Low Energy