Put that novel password "12345" aside for a moment. The founders of Knock -- an iOS app that launched Tuesday -- want to make getting into your computer as easy as rapping your knuckles through the pocket of your jeans.
And that's exactly what their service allows. Using Bluetooth low energy technology to let iPhones communicate with their Mac brethren when in proximity to one another, the Knock app turns two steady knocks on the front or back of your phone into a secure unlocking tool to let users bypass the Mac password screen.
The iOS app is $3.99 and works in conjunction with a free Mac counterpart. It only works on select computers: MacBook Airs and 2011 Mac Minis or newer; MacBook Pros and 2012 iMacs or newer; and Mac Pros from this year only.… Read more