For a long time there have been rumors of an included biometric sensor in the next generation iPhone. They originated from some code found in beta versions of the iOS 7 SDK that was published by 9To5Mac. This information seemed very plausible, however,we were not sure Apple planned to release this new hardware in the next generation.
Other leaks including that on Sonny Dickson claim that they have the actual hardware piece behind the sensor, and that it is planned to be implemented into the new iPhone 5S. The change will be seen in the home button as both the software information and hardware imply. This new feature will most likely be one of the biggest upgrades seen between the iPhone 5 and iPhone 5S. Using fingerprint security may become the new lockscreen.