Backup encryption key

[Yuval Hager]

On Thursday 23 April 2009, Shachar Shemesh wrote:
> I should point out one huge disadvantage of storing binary diffs when
> using encrypted systems. There is no (practical) way to erase old
> backups. Your backup storage size is bound to be ever increasing. This
> is because the only way to create a new complete snapshot (i.e. - a
> non-incremental backup) is to retransmit the entire backup data. Because
> the remote side is encrypted, you cannot use it to expand the image
> remotely.

I have not given as much thought as you to the details here, but if I read 
the man page correctly, duplicity does allow to --remove-older-than. I am 
not sure how that works though.

--y
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