I realized that if I was ever robbed of my phone and killed, the perp could use my fingers to unlock the phone and get all my data. The dilemma is that I like the convenience of the fingerprint unlock and I didn't want to stop using it. Here is my solution: 1. Set the phone to delete all data after 10 attempts. 2. Don't use the thumb, you have 10 fingers (hence the genius of Apple setting the number of attempts to 10!!) 3. For the finger you do use, set it at a different angle, so even if they guess the right finger, they have to also guess the correct angle. Voila! A more secure phone.