Android

Biometric anything feels weird, being an identical twin. I stick to never using it.

it is an oxymoron. Biometrics are the equivalent of a username, not a password.

Pragmatically, is that really any different with a passcode? Someone might not be able to physically force an unlock like with biometrics by moving the relevant body part over, but there's certainly nothing stopping someone from forcing you to unlock your phone if you had a passcode through by duress. Most thieves would have certainly wised up enough to force you to remove your passcode before leaving, or they'd watch you unlock your phone, and figured out the passcode that way.

I rather doubt that, if in that kind of situation, there would be many who would resist. Your phone is not worth your life for most.

Personally, if I wasn't doing anything sensitive, like travelling through some countries (like Australia/the US) or going to a protest, I'd probably keep it on. The convenience makes up for it for the most part.

If I can't change it once it gets breached (because it will get breached), then it's not security, it's a hurdle at best. Biometrics entry isn't security; it's convenience.

If I were a breaking bad meth dealer and had all my buyers as contacts on that phone and all my incriminating chats, I wouldn't use biometrics to unlock it. But I'm not a meth dealer (and I'm not just saying that because that's what a meth dealer would say).

There is a spectrum of convenience vs. security. It depends on where you sit. I'm okay with the fingerprint, wouldn't go for the face.

Doesn't Android have the panic/cop switch where you force password over biometrics unlocking? It's not a 100% failsafe but it is a start.

For every day use, I use it. It’s convenient.

If I’m traveling or going to a protest, I’ll turn it off. I also make sure I know the ways to disable it.

Do NOT use biometric unlock in the U.S.

Law enforcement can force you to open the phone vs. requiring a warrant for PIN/Password.

Graphene allows for fingerprint and second factor pin unlock, which is what I use. I mostly do that for cops, though, since in the US you can be legally compelled to unlock your phone with biometrics but not pin.

Wouldn't stop someone from torturing you to unlock your device, but that's what a duress pin is for ;) (they may kill you once your phone wipes but at least they wouldn't have your data)

Police officers cannot force you to unlock your phone by a testimonial act that reveals the contents of your mind. You can be forced to unlock your phone by a nontestimonial act.

From here...

If only for the above reason, I refuse biometrics on any of my devices. 🤷‍♂️

I don't use it at all, even with various bank apps and such yelling at me to do so. Yeah, a $2 wrench could still eventually get it out of me, but you can't just use my face/finger to do so.

I run GrapheneOS on my phone and reject all biometrics on principle not because I have anything to hide.

biometrics are for usernames and not passwords/keys.

GrapheneOS allows it to not be used as the device unlock, but still use it for other apps once unlocked (such as banking apps).

Device unlock should never be biometric.

I also have data over the usb port disabled unless the device is actively unlocked.

For proper user authentication the model always used to be that the user should present three things: something they were (a username for instance), something they knew (a password), and something they had (a OTP from a device, or a biometric). The idea being that, even if a remote attacker got hold of the username and password, they didn't have the final factor, and if the user was incapacitated or otherwise forced to provide a biometric, they wouldn't necessarily supply the password (or on really secure systems, they'd use a 'panic' password that would appear to work, but hide sensitive information and send an alert to the security team).

Now we seem to be rushing into a system where you have only two factors, the thing you have, namely your phone, and the other thing you have, namely a fingerprint or your face. Notably you can't really change either of those, especially your biometrics, so they're entirely useless for security. Instead your phone should require a biometric and a password to unlock. The biometric being 'the thing you are', the phone 'the thing you have', and the password being 'the thing you know.

So, yes, I'm entirely against fingerprint unlocking.

Biometrics are fine as a /username/ but should not be used as a password - heard that on some security podcast ages ago and have kept with it since.

So basically I don't use biometrics, lol

As opposed to what? What will you use that's impervious to those things?

They're generally a bad idea, especially if you're a political dissident.

I don't use ot on the lock screen.

Half the time, I bypass it on the apps because I'm wearing gloves at work.

While I’d want to turn off biometrics if I thought I was in a risky situation:

• pin required on restart
• Lock Screen is pretty fast
• must importantly sensitive apps and settings use a secondary authentication, including in app switching

So they could force me to unlock it, but probably wouldn’t take the time to hunt down all the places there’s secondary authentication. So damage would be partly mitigated

The thumbprint and facescan reader on my phone straight up says that it's not necessarily good enough to distinguish me from family members (especially if we look similar, which we do) when you go to set it up, so I've pretty much never used either.