Re: [plasma] Plasma and File protection Question

Stephen Farrell <stephen.farrell@cs.tcd.ie> Tue, 19 April 2011 21:39 UTC

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Date: Tue, 19 Apr 2011 22:39:55 +0100
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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To: Trevor Freeman <trevorf@exchange.microsoft.com>
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Subject: Re: [plasma] Plasma and File protection Question
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I've no idea what OPC is but I'd have thought that OOXML
would likely be controversial - or have all the word
processing types made up since the OOXML/ODF kerfuffle [1]
of a few years ago?

S.

[1] http://en.wikipedia.org/wiki/Office_Open_XML#Standardization_process

On 19/04/11 22:19, Trevor Freeman wrote:
> Having agreed that files and are the conceptually the same as email from
> a policy access control perspective, there is one important distinction.
> 
>  
> 
> Email has a standard mechanism to define multiple parts of a message to
> represent different aspects of the message i.e. MIME.
> 
>  
> 
> We don’t have that for files so we don’t have a simple generic way to
> attach the extra metadata to a file.
> 
>  
> 
> Some standard file formats have specific extension mechanisms we can use
> e.g. OOXML which would allow you to define a way to attach the plasma
> metadata to the file type in question.
> 
>  
> 
> Alternatively there exist generic file container standards what can hold
> any combination of files and data e.g. OPC which would provide a generic
> solution for any file type.
> 
>  
> 
> If we were to expand files for consideration with Plasma, which would be
> the best first step, a specific solution like OOXML or a generic
> solution such as OPC?
> 
>  
> 
> *Dr Trevor Freeman*  Senior Security Strategist
> 
> *End to End Trust Team
> <http://www.microsoft.com/mscorp/twc/endtoendtrust/default.mspx>*
> 
> *Microsoft Trustworthy
> Computing<http://www.microsoft.com/mscorp/twc/default.mspx>* 
> 
>  
> 
> 
> 
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