Following its 2012 acquisition of mobile security firm AuthenTec, which specialized in fingerprint sensors, Apple has been rumored to be looking to incorporate its technology into its future products. Rumors have indicated that such a sensor could be a differentiating feature for Apple's upcoming iPhone 5S, although there has so far been little in the way of solid evidence that such a feature is in the works. But as noted by 9to5Mac, Apple's developer release of iOS 7 beta 4 today has brought a significant clue that Apple is indeed planning to bring th
