Meet RollJam, the $30 device that jimmies car and garage doors

Widely used keyless entry systems can be hacked in seconds with wallet-sized device.

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Modern Major General Thanatos[/url]":cdqtawee]

sprockkets[/url]":cdqtawee]"Once RollJam has collected the latter rolling code, it uses the second radio to broadcast the earlier rolling code to the lock. RollJam then stores the latter rolling code."

Weird, sounds like a short window.

Problem is, it sounds like this happens when you go to unlock your car. You'd be physically present the whole time until later when you go to unlock or lock which then makes that newer code never used, useless.

Right?

Wrong.

Find car you want in a parking lot. Save code. Come back next day. Unlock car. Congrats, you have a car.

I don't know about you, but I lock my car whenever I get out. In such a use case, this presumes the car has not moved since it was parked, or else the stored code would have already been used.