Native ZFS encryption is now on master (Github) in ZFS on Linux.
If you want to read more about ZFS encryption, Philipp C. Heckel wrote a blog post about it back in January 2017. I also recommend Rolando Abarca’s post about encryption on ZFS on Linux.
Right now, I don’t need encryption on ZFS since I don’t have ZFS snapshots on a remote machine anymore. But I heavily depend on ZFS because my NAS still runs FreeBSD with ZFS. And I don’t plan to change that.