When a lot of folks think of fingerprint scanning technology they often assume there's a single way to do it, but nothing could be further from the truth. There are actually over a half dozen different technologies -- and combinations thereof -- that various devices employ to read prints, with varying levels of reliability, and yes, some of them would indeed work with a finger you chopped off of a dear friend, but the Touch ID sensor on the iPhone 5s isn't one of them.
Based on what Apple has revealed regarding Touch ID and what the company's own patents have suggested, the s
