Re: [plasma] Plasma and File protection Question
Phillip Hallam-Baker <hallam@gmail.com> Wed, 20 April 2011 00:14 UTC
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Date: Tue, 19 Apr 2011 20:14:24 -0400
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From: Phillip Hallam-Baker <hallam@gmail.com>
To: Trevor Freeman <trevorf@exchange.microsoft.com>
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Subject: Re: [plasma] Plasma and File protection Question
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OPC sounds like an appropriate container then. On Tue, Apr 19, 2011 at 7:13 PM, Trevor Freeman < trevorf@exchange.microsoft.com> 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 > > > https://www.ietf.org/mailman/listinfo/plasma > > _______________________________________________ > plasma mailing list > plasma@ietf.org > https://www.ietf.org/mailman/listinfo/plasma > > -- Website: http://hallambaker.com/
- [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