I was recently intrigued to learn that only half of the respondents to a survey said that they used disk encryption. Android, iOS, macOS, and Windows have been increasingly using encryption by default. On the other hand, while most Linux installers I’ve encountered include the option to encrypt, it is not selected by default.
Whether it’s a test bench, beater laptop, NAS, or daily driver, I encrypt for peace of mind. Whatever I end up doing on my machines, I can be pretty confident my data won’t end up in the wrong hands if the drive is stolen or lost and can be erased by simply overwriting the LUKS header. Recovering from an unbootable state or copying files out from an encrypted boot drive only takes a couple more commands compared to an unencrypted setup.
But that’s just me and I’m curious to hear what other reasons to encrypt or not to encrypt are out there.
Well, I think you already mentioned the key thing about encrypting disks. It’s not about protections when the block device is already decrypted and the filesystem already mount. At that point your disks are decrypted and anyone with or without physical access to your device, if gaining any access to it you’re toast. That’s true, but that’s not what disks encryption help you with, and you already mentioned. If you turn off your device, and someone steals it, or gains access to it, they can’t look at your contents, that’s it. That wouldn’t prevent malicious people, to instead plant something through UEFI for example, and you are right about that case. And if you never turn off your computer, and just do sleep to memory, then you depend on how strong your password is, or any other authentication mechanism you have…