Wireless Car Keys security flaw

The machine itself
Total cost of this machine: $30. This device called Rolljam cracks the wireless key systems mainly on cars and garages. When the device is activated, the victim will click the keys only to send the signal to the Rolljam device. Rolljam will store the key for later use i.e. jacking the car later on. The victims second press of the car keys will send the signal to the door and open it. This is a very important security flaw that probably affects at least 50% of the vehicles on road in UK right now. Read more: https://www.defcon.org/html/defcon-23/dc-23-speakers.html#Kamkar http://www.engadget.com/2015/08/10/hacking-device-lets-thieves-open-your-car/