Re: cloning a lvm crypto volume to a bigger disk
07/07/2011 08:35, Jochen Schulz wrote:
>> I guess if I didn't have it I would need a separate dm-crypt and LUKS
>> partition for each of /, /home and swap which in turn would mean 3
>> separate keys + passwords.
> Yes. You could get away with only one passphrase if you put key files
> for the other filesystems on that one.
Here I use on my desktop a pass-phrase for / (typed during boot),
decrypt_derived for swap (see #8 in
/usr/share/doc/cryptsetup/README.initramfs.gz), and pam-mount for /home
(decrypting is done on login).
On the laptop I use essentially the same setup, but /boot and the /
key-file are stored on an usb flash-disk with hardware encryption (see
#10 in /usr/share/doc/cryptsetup/README.initramfs.gz), this way I only
need to type in my login, it makes booting the laptop quicker.
If you don't care about suspend to disk you can also use a swap file on
an encrypted partition instead of decrypt_derived, or a random key
generated on startup, reducing complexity.