Biometric detection is the all the rage within mobile devices at the moment. The inclusion of Touch ID on Apple's iPhone 5s sparked a mass scramble for competing manufacturers to be in a position to roll their own fingerprint solution with their wares. Samsung followed in closely behind Apple with its fingerprint sensors, and it's now something that we almost expect to form part of a device's technical DNA. This type of authentication will inevitably bring with it a whole heap of security related questions and concerns, some of which have been exposed and exploited at the Black Hat Security Conference in Las Vegas.