samy kamkar
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This $30 device defeats almost any keyless car or garage door
You probably don't think about thieves when you unlock your car, but Samy Kamkar certainly does. The security researcher known for his droll (and scary) hacks has created a device called "Rolljam" that cracks the wireless entry systems used by car- and garage-door makers. He demonstrated it at Defcon 2015, and here's how it works. When a victim tries to remotely open their car with a fob, they'll notice it didn't work the first time. It'll appear to work the second time, but at that point, the thief will have stolen a code they can use to open your vehicle at their leisure.
