Cool, even Sony has been working on the similar technology quiet from a while. They are working on a gesture and facial recognition based security system.<p>Sony’s gesture and expression based security system is combining different authentication methods to avert security breaches. It is combining facial recognition, voice recognition, facial expressions, gestures, and IR sensing. In short, I can say that you can login into your computer or can enter into your office by smiling in front of the camera.<p>You can check about it here - <a href="http://greybmusings.wordpress.com/2014/06/03/sony-forget-passwords-and-now-smile-to-unlock-your-smartphone/" rel="nofollow">http://greybmusings.wordpress.com/2014/06/03/sony-forget-pas...</a>