If iOS7 jailbroken, can apps peek at fingerprint data?
Apple said they are talking to fingerprint scanner and the a7 directly.
If ios7 jailbroken or grant root access, will it be possible for apps to access or peek at fingerprint data.
This way, even if the stored data is accessed, you'll have a hard time reconstructing the original fingerprint characteristics, and it'll be pretty much impossible to regenerate the fingerprint itself.
Since it's stored on the phone, the print or the print informations are somewhere in your device. Encrypted or not I'm pretty sure someone is going to find out how to retrieve what he wants.