I don't understand. So if I only lock my phone (turn the screen off) without rebooting it, it is not fully encrypted (considering that the device storage encryption is enabled)?
this post was submitted on 14 Jan 2024
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Something like that. I'm not familiar with the exact details, but there is an additional layer of encryption that applies before the first unlock after a reboot.
Parts of the OS have to be unencrypted for it to function properly.
Autoreboot is a thing on Samsung phones for quite a while, you can even choose the days of the week and the time for the reboot.
Not for a while, at least not on their flagships.
As long as "auto" doesn't mean "forced".
But knowing current trends, especially with Android, it likely will be.
This is just GrapheneOS, this isn't something you get in a big tech phone. Also this is if you were to not unlock your phone for this amount of time. Say your phone is confiscated, they have 18 hours (new default settings) to basically break into your phone otherwise it auto reboots from not successfully unlocking and goes back into that encrypted locked mode.
So as long as you're unlocking your phone once 18 hours, it won't reboot. 18 is just the default too, you can make it more it less, or disable it entirely. But it will never really affect a normal person.
Option to enable automatically rebooting the device when no profile has been unlocked for the configured time period to put the device fully at rest again, which is enabled by default at 18 hours. This can be configured at Settings > Security > Auto reboot.
https://grapheneos.org/features#auto-reboot
But it's a security measure to get it to BFU, where data is at rest and secure, in case your phone is out of your possession for an extended period of time (someone steals it, police take it, etc) so it becomes harder to exploit. I've set mine to 12. Some do 4 or even less. Feel free to turn it off.
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