On Thu, Jan 05, 2023 at 05:13:05AM +0000, Nathan Carruth wrote: > Perhaps I should have clarified my use case. I have data which > is potentially legally privileged and which I also cannot afford > to lose. Thus an unencrypted backup is out of the question, and > my first thought was to use full-disk encryption for the backup.
For this particular use-case, you can just pipe tar through the openssl command line utility and write the backup to removable media either directly or as a file on a non-encrypted filesystem. I wrote in detail about this method in an article about doing encrypted backups to blu-ray disc: https://research.exoticsilicon.com/articles/crystal_does_optical
