this post was submitted on 15 Apr 2025
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Yet another excuse to keep checking our phones.

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[–] IllNess@infosec.pub 51 points 6 days ago (1 children)

These changes are a good thing.

Requiring a pin means no one can use your fingerprint or your face to unlock your device.

An NSA agent recommended restarting your phone every week. This can potentially clear out malware that doesn't have permissions to start after a reboot.

[–] Ulrich@feddit.org 23 points 5 days ago* (last edited 5 days ago) (1 children)

It's more than that. After restart your phone goes into a more-secure Before First Unlock (BFU) state so it's much harder to penetrate.

Apple started doing this a few months ago and I guess Google is just catching up.

[–] IllNess@infosec.pub 4 points 5 days ago (1 children)

Thank you for the info.

I read up more on BFU and I didn't realize that encryption was a requirement for Android 10 and higher.

Very interesting.

What I read: Dakota State University DigForCE Lab: BFU and AFU Lock States

[–] Ulrich@feddit.org 2 points 5 days ago

Yeah I learned about it from reading up on the Israeli hacking software called Pegasus. There were several devices that they could hack in AFU state but not in BFU state.

[–] Mensh123@lemmy.world 5 points 4 days ago

It would be great if it wasn't just in Play Services but in base Android so that every de-Googled system had it too. Still a good change.

[–] Geodad@lemm.ee 32 points 5 days ago (1 children)

Copying GrapheneOS security policy. It's a good move.

[–] Album@lemmy.ca 29 points 5 days ago

Yet another excuse to keep checking our phones.

What? You think Google cares to wait 3 days to make you check your phone? No if that was their objective you'd be checking earlier.

The point here is to keep encryption keys out of memory on a device you haven't used so that someone with physical access to your phone can't pull the keys.

[–] user224@lemmy.sdf.org 8 points 5 days ago (1 children)

Should have made it customizable rather than hard-coded 3 days.

[–] henfredemars@infosec.pub 1 points 2 days ago

I wonder if there's a technical argument to not doing this -- it's harder for attacks to potentially change the setting if it isn't a setting.