Apple unveiled two new iPhone models Tuesday, the iPhone 5C and iPhone 5S, the latter of which has a fingerprint sensor built into the home button. The sensor will allow users to use their fingerprints instead of a password to unlock the device and make purchases on iTunes. Its not clear if the feature will also be used in other scenarios that have yet to be revealed or if third-party applications will also use it to authenticate users or if it will be used by third party applications.”]