Chances are that your smartphone has a fingerprint scanner built into it to help you unlock your device. One advantage to fingerprint scanners is that it makes it faster to unlock handsets than typing a pin number.
However, it’s also more secure because, as we’re constantly reminded about via CSI-style detective shows, all of us have unique fingerprints. As a result, a fingerprint scanner stops someone else unlocking your phone in the way that they could if you knew your passcode.
As it turns out, computer scientists at New York University and Michigan State Universtiy have been working on developing digital “master prints.” These are the biometric equivalent of master keys, capable of tricking a variety of fingerprint sensors that trained to recognize your “unique” fingerprints.
http://www.digitaltrends.com/cool-tech/master-prints-unlock-phones/
