> "SpiderOak saves storage space using intensive data de-duplication. In
> this way, SpiderOak can often keep all of the historical versions of a
> file, using about the same amount of space that would be required to
> store only the most recent version."

This COULD be done at each node without such storage being 'in the
cloud'. Would need to read more ... .


> I'm not sure there is a service that actually stores only data that has
> been encrypted with a key that only the user knows.

Any system where you encrypt the data before submitting it meets
whatever security you provide.
You could one-time-pad process the data at each end, or use PGP or
whatever, completely invisibly to SpiderOak or whatever other
transport system. Liable to play haoc with web based de-duplication
though :-)
..


      Russell
--=20
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