[colug-432] dropbox clone

[Judd Montgomery]

On Thu, Jul 28, 2011 at 09:30:47AM -0400, Steven Lefevre 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?
>

You can use encfs to do what you want to do.  If you use the --reverse
option when mounting an encfs volume the "view" of the unencypted
files will be encrypted.  They are still files though, so if you
change a non-encrypted file, the encrypted file will change in the
"view".  You can then do incremental backups with rsync from the encfs
mount point.  Encfs has worked really well for me for this purpose.

http://www.webupd8.org/2011/06/encrypt-your-private-dropbox-data-with.html

Encfs home: http://www.arg0.net/encfs

Judd