Abstract: A method and apparatus for an automobile security system. A GPS Receiver is used to measure the location of an automobile, and after the user has left the car, to measure the location of the user. The location of the car when it is parked is recorded in the GPS Receiver System. When the user is more than a pre-determined distance from the car, as determined by a GPS location measurement that is compared with the stored GPS location, the security system is activated and the car is locked. Subsequently, when the user comes within a second pre-determined distance of the car, the security system is deactivated, and the car is unlocked. Advantageously, both the locking and unlocking is accomplished without forcing the user to perform any manual act. Advantageously, the user can get directions from the GPS Receiver to help locate the car.