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Subject: Re: [office] RE: Part 3 CD01 7.2.1 PD1.4 Forbids encryption of signatures
"Andreas J. Guelzow" <andreas.guelzow@concordia.ab.ca> wrote on 04/30/2010 12:53:47 PM: > > Re: [office] RE: Part 3 CD01 7.2.1 PD1.4 Forbids encryption of signatures > > On Fri, 2010-04-30 at 10:34 -0600, robert_weir@us.ibm.com wrote: > > It is just defining > > the behavior for the real-world complexity that already exists. You can > > receive an encrypted documented and then want to sign it. > > Why would you want to sign an encrypted document? > > Andreas It depends on the context. In some cases signing indicates authorship. I sign what I wrote. In other cases signing denotes approval. I reviewed the document and I sign it to indicate that I approve it. Whether or not it is also encrypted is an orthogonal question. Certainly I wouldn't want to sign something I cannot also decrypt. But I might want to sign something that only a small number of people can read, like a private contract. -Rob
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