I've never used it, but I've seen people on HN recommend Attic. It dedups and encrypts. https://attic-backup.org
Personally, I use git-annex, which isn't exactly a backup tool but a general distributed file manager which can, among other things, automatically make encrypted copies of the files to various places (SSH servers, S3, Google Drive, etc).
Personally, I use git-annex, which isn't exactly a backup tool but a general distributed file manager which can, among other things, automatically make encrypted copies of the files to various places (SSH servers, S3, Google Drive, etc).