I've found some full-disk encryption (FDE) solutions for Linux OSes. Specifically, I've looked at solutions that work on Linux Mint or Ubuntu, since that's what I tend to use. But I'm sure this question applies to other distros, as well.
I'm looking for a full-disk solution that works as seamlessly for the user experience as it does with FileVault on macOS.
The FileVault experience is as follows:
- FileVault encrypts the whole disk. Doing so is a one-click operation in the prefs panel for Security.
- FV provides a pre-boot environment that unlocks a Mac equivalent of a Trusted Platform Module (it may actually be a TPM, but I don't think it is), which is the thing that locks up the key(s) that actually did the disk encryption
- When you log in, you actually log in to the pre-boot environment. This then unlocks FV's keys. Only then is the OS disk unlocked.
- The OS user's password is synchronized with the FV password; to the end user this is all seamless (except in a few use cases)
On Windows, BitLocker works with the TPM in much the same way as described above for FileVault.
On Linux, however, even with TPM tools installed, every full-disk encryption scheme I've encountered has required a boot password in addition to the login username and password.
For example, this (very well written and detailed) Linux Mint example:
In this example, (which is like a million easy-to-flub CLI steps, btw), FDE is done, but you can see the user has to type in a decryption passphrase into the Grub prompt on boot.
Has anyone cracked this nut for Linux?
- User experience is such that user enters their login and password only once
- Full disk encryption (including boot partition)
- (Nice to have) Setup is easy, or, at the very least Simple(TM)