[pstoll]

About iOS fingerprint- while a judge can not compel you to type in a password, I have heard that they can compel you to swipe your fingerprint. Something to consider when deciding whether to enable fingerprint access to your smart phone login or other sensitive credentials (e.g. Password manager keychain credentials).

http://jolt.law.harvard.edu/digest/telecommunications/court-...

(Fwiw - I use LP, no master password saved, no iOS finger print access)

[fuzzywalrus]

I wish there was a way to combine a simple 4-6 digit pin with fingerprint, it'd certainly make an attack on a physical device more cumbersome, especially if the rejection happened after the TouchID so the error was obfuscated on what failed.

[pmontra]

Your fingerprints are already on the phone, they don't need to ask. After getting access to the phone owner accounts and data they can use other investigation methods to get proofs that can be used in a trial. Tl;dr, fingerprints are a password replacement only against people that can't read them.