In five minutes, a single person faked a fingerprint and broke into my phone. It was simple, a trick the biometrics firm Vkansee has been playing at trade shows for months now. All it took was some dental mold to take a cast, some play-dough to fill it, and then a little trial and error to line up the play-dough on the fingerprint reader. We did it twice with the same print: once on an iPhone 6 and once on a Galaxy S6 Edge. As hacks go, it ranks just a little harder than steaming open a letter.