Those fancy entry locks with the touch-sensitive numeric keypads are so 2012. Kwikset's new Kevo deadbolt quizzes your iPhone to verify that you're authorized to enter, and then unlocks when you physically touch it.
Kwikset licensed the technology from Unikey Technologies. I recently spoke with UniKey CEO Phil Dumas to learn how the Kevo works.
"We've developed a product that is truly a passive entry solution," said Dumas. "We use Bluetooth low energy [a component of the Bluetooth 4.0 standard], so your phone needs to be in fairly close proximity to the lock to communicate with it. We require you to touch the lock before you can enter, so you don't unlock the door as you're walking by."
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