Re: [plasma] Plasma and File protection Question
Stephen Farrell <stephen.farrell@cs.tcd.ie> Tue, 19 April 2011 23:29 UTC
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Date: Wed, 20 Apr 2011 00:29:25 +0100
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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To: Trevor Freeman <trevorf@exchange.microsoft.com>
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Cc: "plasma@ietf.org" <plasma@ietf.org>
Subject: Re: [plasma] Plasma and File protection Question
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Hi Trevor, I don't have a real preference/opinion myself except that a credible proposal here should have real support from various sources, optimally including the open-source community. S. On 20/04/11 00:13, Trevor Freeman wrote: > OPC = Open Packaging Convention; it’s the official standard name for zip > files. > > The attraction of an OPC solution is you can protect anything just as > you can zip anything so it would generate a universal solution. > > Both OOXML and ODF are widely used standards with multi-vendor support. > The reason to cited them as examples is that they have a documented > file format with extension points we could use to build a solution. > > I doubt the OOXML\ODF thing will go away just like pkix has cmc and cmpJ > > Would you consider OPC a more neutral solution? > > > > -----Original Message----- > From: Stephen Farrell [mailto:stephen.farrell@cs.tcd.ie] > Sent: Tuesday, April 19, 2011 2:40 PM > To: Trevor Freeman > Cc: plasma@ietf.org > Subject: Re: [plasma] Plasma and File protection Question > > > > > > 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>* > >> > >> > >> > >> > >> > >> _______________________________________________ > >> plasma mailing list > >> plasma@ietf.org <mailto:plasma@ietf.org> > >> https://www.ietf.org/mailman/listinfo/plasma >
- [plasma] Plasma and File protection Question Trevor Freeman
- Re: [plasma] Plasma and File protection Question Stephen Farrell
- Re: [plasma] Plasma and File protection Question Trevor Freeman
- Re: [plasma] Plasma and File protection Question Stephen Farrell
- Re: [plasma] Plasma and File protection Question Phillip Hallam-Baker