Just a quick bit of info -- Snebu is an open source backup tool I put together a number of years ago, and have been using it in a lab backing up about 50 hosts.

Just a quick bit of info -- Snebu is an open source backup tool I put together a number of years ago, and have been using it in a lab backing up about 50 hosts. It is snapshot based, and maintains a database backed backup catalog (using SQLite), and is quick to set up / low maintenance. Since it uses "tar" as a serialization format (it ingests tar files, storing the metadata from the tar headers in the DB), I was able to add encryption by creating "tarcrypt" as a filter for tar files. This extends that tar file format a bit (documented in the above page), and uses public key encryption with HMAC verification. The tarcrypt program can stand on its own.