duplicati-bin : Free backup client with strong encryption, deduplication and cloud storage (GUI binary) ( https://duplicati.com https://github.com/duplicati/duplicati )
kopia : Fast and secure open-source backup tool with end-to-end encryption ( https://kopia.io/ https://github.com/kopia/kopia )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a bentoo
For Paludis use this rsync : rsync://gentoo.zugaina.org/bentoo-portage
If you have a problem : ycarus(-at-)zugaina.org