Google responded to security complaints about the Facial Unlock feature introduced as part of Ice Cream Sandwich by implementing a “Liveness Check” in Jelly Bean. Simply, the added layer of safety is designed to prevent the ability to spoof the lock method using a photo of the phone’s owner by requiring the user to blink. Well, getting around the new measure isn’t all that difficult, but does require a bit more work than the previous implementation. Step one: shop a photo of the phone’s owner so as to make their eyes appear shut. Step two: cycle between the two images on a computer screen.
As we have said before, Face Unlock remains a neat party trick, but there still remains a need for further refinements before it becomes a go-to unlock method.