> They will never use that information to exonerate you, it will ALWAYS BE USED AGAINST YOU. Dont give them the chance.
[Obligatory YouTube video, "Never Talk to the Police"](https://www.youtube.com/watch?v=d-7o9xYp7eE
), because seriously, this is spot on. Absolutely nothing you say or provide the police will ever help you if they suspect you of a crime. Nothing. That is not a hyperbole, that is not anti-cop rhetoric, it is simply the process of criminal law. And this applies to *any and all information*. Especially verbal.
Jump to 8:00 in that video for the quick explanation, but honestly, watch the whole thing. Thank me later.
If you've ever been fingerprinted your prints are already insecure.
Also, FYI (for the new IOs) if you press the side button five times quickly it will lock your iPhone, disable the biometric unlock, and require a passcode.
Useful if you’re ever pulled over, going through customs, etc. and want to keep your privacy.
Edit: to clarify, this will only work for iPhones with iOS 11 which will be released later this month.
This tip still wouldn't have helped the lawyer in the example
Biometrics are are usernames, not passwords. You cannot change your biometrics.
> It turns out that there are more people on earth than unique fingerprints.
That's not really true. I used to make fingerprint powders, so I know a little bit about this.
Put simply, points where the individual friction ridges start, end, meet or separate are the defining 'minutiae' (along with pores in the skin) that allow you to identify someone. (also known as level 3 features.) If you fully map a fingerprint, no two people have ever been shown to have the same fingerprints. Not anywhere near.
But if, instead of looking at the whole finger, you just take a certain number of these points for identification, you create a chance that you can mix two people up. If you only looked at one point, that's completely useless. Two points is not going to do much. Different countries police forces have used different numbers of these minutiae as their threshold for have a reasonable probability that fingerprints do or do not match. And the use depends on the situation. If you have five suspects, and one murder weapon with fingerprints, it is much easier to be sure you're matching the fingerprint to the right person, even if you use fewer features.
If you take a few features and stick in in the database of every fingerprint you have, you've got a vastly higher number of people so you'd need to use more minutiae to avoid the higher odds that you'd mix someone up.
YSK that biometrics make great user names but shitty passwords.