Re: [Hampshire] FW: Secure Archives

Hi

What you want to do is not sensible.

The best thing to do is compress first and then encrypt.

If you do both at the same time you would end up with a larger data file.

Better still copy your data files into one large file. This will give you
smaller file sizes as it will remove the space taken up by slack space. It
will also give compression programs a larger set of common data to compress.

There are programs which copy your data files into one big file. You then
compress this one large file. After compression you then encrypt it. This
will give you the smallest possible data file.

Some of these programs are Free Windows programs but they do work in wine.

John Eayrs



On Saturday 12 June 2010 14:27:45 Rob Malpass wrote:
> Hi all
>
>
>
> I've been experimenting a bit lately (due to archiving big files) with
> secure archives. How good is the Archive Manager built into jaunty in
> terms of its comparison to say Winzip? I'm thinking more security than
> compression though the better the compression the happier I am.
>
>
>
> What I'm trying to do is backup about 150Gb of stuff on my NAS to an
> external HDD. Copying the data from one drive to another is quite slow
> and (unless I encrypt the entire drive using TrueCrypt or something) it's
> insecure. So what I want is to compress the data (saving copying time)
> and encrypt is at the same time. I see there is encryption built into
> Jaunty's archive manager but it doesn't announce itself as AES or whatever
> and only looks to allow shortish passphrases. Whether or not it accepts
> more characters as passphrases than it displays I dunno.
>
>
>
> And before anyone suggests I could speed this up - I'm constrained in that
> my NAS is quite old and most of my network "infrastructure" is only 10Mb so
> at best I'm getting about 780kBps transfer speeds.
>
>
>
> Anyone been in this situation and found a sort of "Winzip" for Ubuntu that
> goes a bit beyond Archive manager?
>
>
>
> Cheers
>
> Rob