With the many cloud storage providers that there now exist, would it be possible to add a layer of encryption before the files are saved?
It would be possible to make an encrypted partition in a file, but having to sync a 5GB file when only 5kB have changed is not optimal.
Ideally would I like to have per file encryption and file names and directory names encrypted.
Would something like that be possible?
Update
EncFS might just be what I am looking for.
duplicity with python-cloudfiles is another tool with good encryption support. It supports gnugpg out of the box, and works with most* openstack providers object storage.
It uses rsync like semantics, so is really easy to add to existing scripts;
$ duplicity ~/mystuff/important/data cf+http://my-full-backup
Local and Remote metadata are synchronized, no sync needed. Last full backup date: none No signatures found, switching to full backup.
--------------[ Backup Statistics ]--------------
StartTime 1329330905.94 (Wed Feb 15 18:35:05 2012)
EndTime 1329330906.01 (Wed Feb 15 18:35:06 2012)
ElapsedTime 0.07 (0.07 seconds) SourceFiles 2
SourceFileSize 170871 (167 KB) NewFiles 2
NewFileSize 170871 (167 KB) DeletedFiles 0
ChangedFiles 0 ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes) DeltaEntries 2
RawDeltaSize 166775 (163 KB)
TotalDestinationSizeChange 155070 (151 KB)
Errors 0 --------------------------
-----------------------
http://take-your-vitamins.blogspot.co.uk/2012/02/howto-backup-to-object-store-using.html
Think of this in a slightly different way, how would you do this if it were on say a local shared disk? You could use encrypted ZIP, 7ZIP or as dc5553 suggests gpg/pgp etc. Basically don't think of it any differently than any other shared storage from this respect ok.
