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New App Lets You Unlock Your Mac By Knocking On Your iPhone

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http://techcrunch.com РCan your mobile phone become a replacement for manually typing in a password? That's the promise of a new application called Knock, launching today, which uses an iPhone paired with a Mac desktop or laptop computer to log you in to your locked machine. The system takes advantage of the newer low-energy Bluetooth technology to enable the connection between the two devices, allowing you to just knock (you know, knock, like on a door) on your iPhone to login. But the company has ambitions to expand beyond unlocking computers, and envisions bringing Knock to browsers to log into websites, and eve (IT news)