Each device has a unique key that takes 18 billion billion values. With 100 computers, it would take several decades to find such a key. Therefore KeeLoq was widely believed to be secure. In our research we have found a method to identify the key in less than a day. The attack requires access for about 1 hour to the remote control (for example, while it is stored in your pocket). Once we have found the key, we can deactivate the alarm and drive away with your car.
This research is the joint work between 3 research groups: the computer science department of the Technion, Israel, the research group COSIC of the Katholieke Universiteit Leuven, Belgium, and the math department of the Hebrew University, Israel.