Startup Idea : Fingerprint Security Scanner

The iphone 5s has a fingerprint scanner which is already an excellent security feature. But there is one more thing you could add to it to make it better. The fingerprint scanner will be an app that runs in the background and records the fingerprints every time you unlock your screen and sends you a daily email with the fingerprints that have been used to unlock the screen. So incase you say your phone gets stolen, there is a high chance that the person who steals your phone presses the home button and as he does that fingerprint scanner app does its job and records the fingerprint which you would receive at the end of the day. And this way you would be able to figure out the fingerprint of the person who stole your phone. There could also be many more uses to this idea.As this is a security feature many companies that use iphones for their businesses would consider this app as they would also be able to track down who has access to the company phone through the fingerprints.