[libreoffice-users] Re: Encrypted MSO files (docx,xlsx) in Libo

On 09/09/2011 02:38 AM, Marcello Romani wrote:
> Il 09/09/2011 10:28, krisb ha scritto:
> > Hi all,
> >
> > This is my first message here so please be tolerant :)
> > Maybe it is a not right place to ask, but let me start. I'm wondering if is
> > possible to open encrypted xlsx/docx files in Libo? IMHO MSO rights and
> > concept of protecting files exclude possibility of opening it in competitors
> > software, since it would be a breaking of encryption algorithm and it would
> > be against MSO rights. Am I right? The encryption methods are part which I
> > am not well acquainted yet :)
>
> Let's forget for a moment MS's anti-competitor practices. Encryption 
> doesn't rely on the algorithm being secret, but on the /encryption key/ 
> being secret and strong enough to be practically impossible (or 
> extremely costly) to guess with brute force.
>
> The fact that MS tries to keep algorithms or implementation details 
> hidden to hinder competition is a more general problem which has nothing 
> to do with encryption.
...
Really? I see nothing hidden here:

http://msdn.microsoft.com/en-us/library/cc313071%28v=office.12%29.aspx
<http://download.microsoft.com/download/2/4/8/24862317-78F0-4C4B-B355-C7B2C1D997DB/%5BMS-OFFCRYPTO%5D.pdf>






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