Apple's new Touch ID FingerPrint Sensor technology comprise of the most advanced software and hardware ever used in any device. Apple is the first to use this FingerPrint Sensor technology which uses human fingerprints to unlock iPhone 5S handsets with a single touch.
You must have a question that if you lost your iPhone and someone tries to access your phone may be by chopping off his or her finger and placing it on the scanner, then what will happen. Don't worry it will not gonna happen as The Wall Street Journal points out that modern scanners look for vital signs, in this scenario, a severed finger would be useless.
The company made a point of emphasizing that the fingerprint data is not only encrypted, but stored in a secure, separate area of the A7 chip that's walled off from all other software. Neither Apple servers nor other mobile apps can access it.
Watch features and fingerprints images screen in the below video:
iPhone image courtesy of Apple.