[colug-432] dropbox clone

[Jeff Frontz]

I'm not sure about the mentioned services, but JungleDisk does encryption
and does "duplicate elimination" (allegedly on blocks of a file, not just on
the whole file).  They're pretty tight-lipped about their process, but from
what I've been able to determine, it looks like they do the "duplicate
elimination" prior to (locally) encrypting.

Jeff


On Thu, Jul 28, 2011 at 9:30 AM, Steven Lefevre <lefevre.10 at osu.edu> wrote:

> On Thu, Jul 28, 2011 at 8:23 AM, Scott Merrill <skippy at skippy.net> wrote:
>
> > If you don't want to manage the server end, Dropbox remains a very
> > good product. If your data is sensitive, you should encrypt it
> > yourself before uploading it to Dropbox. TrueCrypt and GPG are good
> > solutions for this.
>
> I assume these services do incremental backups for the most part.
>
> If you have an encrypted volume, and you change its contents, can you
> do an differential backup, or does that file change so much
>
> In other word, suppose I have a 1 GB encrypted file that I back up on
> an online service. I open the volume with truecrypt, and change a few
> lines in a plain text file. How different is the encrypted file? Can
> it be backed up against the existing backup file incrementally?
>
> Steve Lefevre
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