this post was submitted on 26 Jul 2023
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The drive wasn't encrypted, a not-encrypted database dump was on the laptop when the raid happened. It might have had to do with gearing up for the Mastodon update that caused us a lot of grief across Fedi a couple of weeks back. Or it could have been database server debugging; the timing was incredibly bad.
But if the drive wasn't encrypted, how is it "would be encrypted material"?
I'm surprised that people are hosting Mastodon servers without full disk encryption given the overhead isn't significant plus the fact that people have private messages in the DB.
Just FYI, when your drive is encrypted, and the system is up and running, the keys for the encryption are in memory and thus recoverable. And even if they were magically protected by something like SGX or a some secure enclave, you can still interact with the machine and the filesystem while it is running.
So full disk encryption is NOT a silver bullet to data protection when being raided.
AFAIK it's not that easy to access data on the machine while it's running unless they can bypass the lock screen. People pick stupid passwords for their user accounts so it's totally possible to get in in those cases, but otherwise dont you need really sophisticated side channel attacks to get data out of memory on locked system? It's not like there is some port on the MOBO you can just plug into to get access to RAM
I did some work on this a decade or so ago in college. Data stays in memory a lot longer than you'd think at room temp, like minutes, not seconds. If you spray the modules down with an upside down compressed air can, you have plenty of time to remove it, and plug it into some that can dump it to persistent storage.
It's also possible to keep the lockscreen from coming up. The mouse cursor jigglers that folks buy as pranks these days started off as another device LEOs use during raids. I think Wiebetech invented that one, too.
As for dumping the contents of RAM from a running machine, look up "memory forensics." It's a thing that LEOs have done for quite a few years as well.