Split 7-Zip archives into volumes across multiple cloud storage providers

[GoogleCodeExporter]

In addition to the existing mode where a file in the original folder is synced 
to each of multiple cloud storage providers, add a mode where the 7-Zip archive 
is split into N volumes (N being the number of cloud storage providers) and 
upload one distinct volume to each provider.

This way, the space of multiple cloud storage providers effectively sums up 
without the need for the user to care in which folder the original files are 
created. Also, this increases security even further as it's not enough to hack 
a single provider and decrypt a single archive - an attacker would need to also 
hack the N-1 other providers to get hold of the remaining 7-Zip volumes in 
order to decrypt / uncompress a file.

Original issue reported on code.google.com by sschuberth on 27 Mar 2013 at 8:53

[GoogleCodeExporter]

Symform is a different type of cloud storage provider and actually would 
provide you with this feature (with or without CryptSync). Every file is split 
up and stored in sufficiently redundant pieces across multiple cloud locations. 
It's also a source of unlimited free cloud space if you are prepared to give up 
some of your own hard drive space for use by their system on behalf of other 
users like you. 

Sorry if this sounds like a plug (I have no affiliation or other motivation, 
and haven't personally tried it) just it could be your solution.

Original comment by n...@bitnology.com on 20 Aug 2014 at 4:27

[GoogleCodeExporter]

[deleted comment]

[GoogleCodeExporter]

Symform, just like Wuala, has a completely different philosophy than classic 
cloud storage providers like Dropbox. With Symform (and Wuala), your data is in 
fact stored (encrypted, of course) on other poeple's hardware who also run the 
Symform client (and contribute unused space). Dropbox et al on the other hand 
store your data on the company's own data centers. I don't like the idea of 
storing my data on other people's hardware, even if it's (supposedly securely) 
encrypted. I don't really trust the companies either, but in the company's 
storage it's more likely that you "get lost in the noise" ;-)

The whole idea of the feature request was just to make use of the many classic 
cloud storage providers I've signed up by now, combining them into a single big 
storage, with some encryption on top.

Original comment by sschuberth on 20 Aug 2014 at 7:15

[GoogleCodeExporter]

The point with Symform is not only would your data be first encrypted by 
CryptSync (if you like), but then each encrypted file is then further encrypted 
and split into many little bits and each little bit stored on one of many 
different people's hardware. So even if the owner of one of those anonymous 
remote hardware stores looked at your data, he only has a doubly encrypted 
fragment of a tiny part of your file, he is unable to decrypt it or do anything 
with it without also having access to the other say 50 other chunks spread over 
50 other people's hardware. 

I don't know about your whole file or many files getting lost in noise on one 
company server, but your file first being locally encrypted, then further 
encrypted by Symform then blended up and remotely stored in tiny encrypted 
chunks spread across many places sounds like your file getting lost in the 
jet-roar to me! Your far bigger security threat is probably local, not remote.

Original comment by n...@bitnology.com on 20 Aug 2014 at 7:28