iOS 7: How to use TouchID and Password?

[8767092]

I was looking at the iPhone 5S which is very nice, but the finger print reader is a non-starter. If someone wants to unlock your phone, you can't deny them entry as your fingerprints can't be "forgotten".

What I would like to do is use the fingerprint and password on the phone (not passcode. A full 8+ character passWORD) to ensure it is impossible to unlock without both my fingerprint and my password.

How do I set this up?

 

[C DM]

Why can't a fingerprint be deleted (and thus "forgotten")?

Edit: Nevermind, I think you meant it in a different way, unrelated to that.