Re: [gentoo-user] Secure Cloud Backup

[Pandu Poluan <pandu@poluan.info>]

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On Jan 3, 2012 4:55 AM, "James Broadhead" <jamesbroadhead@gmail.com> wrote:
>
> I have a pile of files, and a personal svn repo totalling around 13GiB
> which I want to back up to cheaply to 'the cloud'.  I would also like
> it to be non-trivial for someone with access to the cloud servers to
> decrypt my data.
>
> I have a 50GB free account for Box.net, but would consider others if
> they have significant advantages. The box.net account is only allowed
> upload files of max 100MiB at a time.
>
> Now one problem facing me is that most cloud services don't give
> assurances of bit parity, so I'd like to be able to recover most of
> the files if I lost my local copies and there were bits missing from
> the uploaded backup. This makes the one-big-encrypted-file approach a
> no-go.
>
> My current approach is to use split-tar, with the intention of
> encrypting each file separately. (Is this worse / equivalent to having
> one big file with ECB ? )
> http://www.informatik-vollmer.de/software/split-tar.php
> ...but this seems to have difficulty sticking below the 100MiB
> individual file limit (possibly there are too many large files in the
> svn history).
>
> Any thoughts? I'm sure that many of you face this problem.
>

Make tarball.

Encrypt.

Split using split.

Protect with par2 using the -l option to limit size.

Upload.

Rgds,

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