When Touch ID, Apple's fingerprint sensor, first emerged on the scene with last year's launch of the iPhone 5s, it was dispelled by many as a gimmick. It quickly emerged that it was anything but - rather a very refined measure that enhanced security and promoted seamlessness. With iOS 8, Apple has further expanded Touch ID's reach, adding third-party support allowing banking, password management and other such apps to reap the fruits of the implementation. It's still not without its fair share of limitations, though, and among them, the fact that it doesn't immediately allow a user to log in right after a reboot. It has now emerged that this isn't an arbitrary decision imparted by Apple, but actually, is due to the secure infrastructure upon which Touch ID is based.