Re: [Duplicity-talk] Mirroring vs. Sets

[Lluís Batlle i Rossell]

On Mon, Dec 05, 2011 at 11:52:29AM -0800, email builder wrote:
> Does anyone have any advice of other software that allows
> encrypted mirroring (possibly without doing full backups
> every time)?

Well, rsync makes little data transfer because *both* sides have access to the
information. For many, having the remote side have the deciphering password even
if only for a while, looks like no security.

If you don't care on the roller checksum, and simply block deduplication would
work for you, you can use a backup based on content-addressing like libchop:
http://www.nongnu.org/libchop/

That will allow small data transfers on incremental backups with a quite dumb
remote side, that will never know the ciphering.

You will need a mechanism to trigger the remote garbage collection based on your
requirements, though, for it to throw away old versions.

Regards,
Lluís.