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Friday, 21 February 2003

Trussed Computing for Office

Microsoft has decided that Office's ability to make documents unreadable unless you're running the same version is a feature, not a bug, and now require you to conenct to a server as well.

A user's computer must be able to access the Windows Server 2003 running RMS on first opening a document to authenticate the rights and decrypt the document. Otherwise, the document cannot be opened. In the future, Microsoft plans to offer an "offline" rights authentication mechanism, but not with this version of RMS.

Other issues affecting the portability of rights associated with documents could cause other problems. Nash claimed that RMS is "platform agnostic"--meaning it will work with any operating system--in that "Windows Rights Management supports industry standards." But for people to be able to access RMS-protected documents on, say, Mac OS X or Linux, the operating systems must use XrML (Extensible Rights Markup Language) in the same way Microsoft does. In that case, "there is the opportunity for interoperability of document interchange," Nash said. Otherwise, the document could not be opened on the non-Windows operating system.

The same restriction in one sense applies to other Windows users. "If you shared the document with another Windows user and that Windows user hadn't installed (RMS), that other Windows user couldn't open the document as well," Nash said.


This is exactly what James Grimmelman explains in detail won't work, and why.
Posted by Kevin Marks at 16:41

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About Me

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Kevin Marks
Kevin Marks works on IndieWeb and open web tech. From 2011 to 2013 he was VP of Open Cloud Standards at Salesforce. From 2009 to 2010 he was VP of Web Services at BT. From 2007 to 2009, he worked at Google on OpenSocial. From 2003 to 2007 he was Principal Engineer at Technorati responsible for the spiders that make sense of the web and track millions of blogs daily. He has been inventing and innovating for over 25 years in emerging technologies where people, media and computers meet. Before joining Technorati, Kevin spent 5 years in the QuickTime Engineering team at Apple, building video capture and live streaming into OS X. He was a founder of The Multimedia Corporation in the UK, where he served as Production Manager and Executive Producer, shipping million-selling products and winning International awards. He has a Masters degree in Physics from Cambridge University and is a BBC-qualified Video Engineer. One of the driving forces behind microformats.org, he regularly speaks at conferences and symposia on emergent net technologies and their cultural impact.
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