This is a very interesting idea, but care should be applied when combined with cloud (disk) images. In particular, I worry that if an encrypted disk image is distributed that the well-known passphrase could be used to get the master key from any pristine copy of the disk image. In effect, the master key becomes an open secret. Thus, any instance derived from this disk image would be fairly easy to read regardless of knowledge of the wrapping key.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1857398 Title: ubiquity should support encryption by default with zfsroot, with users able to opt in to running change-key after install Status in ubiquity package in Ubuntu: New Status in zfs-linux package in Ubuntu: New Bug description: zfs supports built-in encryption support, but the decision of whether a pool is encrypted or not must be made at pool creation time; it is possible to add encrypted datasets on top of an unencrypted pool but it is not possible to do an online change of a dataset (or a whole pool) to toggle encryption. We should therefore always install with encryption enabled on zfs systems, with a non-secret key by default, and allow the user to use 'zfs change-key -o keylocation=prompt' after install to take ownership of the encryption and upgrade the security. This is also the simplest way to allow users to avoid having to choose between the security of full-disk encryption, and the advanced filesystem features of zfs since it requires no additional UX work in ubiquity. We should make sure that https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1857040 is fixed first in the kernel so that enabling zfs encryption does not impose an unreasonable performance penalty. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1857398/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
