The way people tilt their smartphone 'can give away passwords and pins'
Interestingly novel!<p>In my university days, long before the days of tablets and smartphones, the computer labs were the usual place where people will congregate to do their assignments or basically kill time on the internet in between classes.<p>One day, my mates and I noticed how annoyingly loud some people type on their keyboards and out of sheer boredom, we decided we could come up with an algorithm to determine what a person was typing simply from recording the sound of the keystrokes from our vantage point. Taking that sound clip, we graphed it out and we proceeded to hash out each "stroke" based on how loud it was in relation to the distance of where we were from the keyboard + the angle of the keyboard.<p>Fun times ensued. ;)