“We got used to using our fingertips to navigate their touch screens with pokes, taps, swipes, and two-finger pinches. There’s more to our fingers than just the tips, though, and a startup called Qeexo aims to take advantage of this with technology that can differentiate between fingertips, nails, and knuckles.”
Read the full article at: http://www.technologyreview.com/news/507516/qeexos-touch-screen-tech-can-distinguish-fingernails-from-knuckles/