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[franco@goldnet.ch: Tags removing permissions]

Yes, a tag of 

grants all permissions that the issuer has to the subject.

Ron Rivest
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Date: Thu, 3 Apr 1997 20:00:33 +0100 (GMT+0100)
From: Franco Papacella <franco@goldnet.ch>
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To: "Brian M. Thomas" <bt0008@entropy.sbc.com>
Cc: spki@c2.net
Subject: Tags removing permissions
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On Thu, 3 Apr 1997, Brian M. Thomas wrote:
> I'm going to take a shot at this.  In our earlier conversations about
> tag intersections, it became clear to me that no one can grant permissions
> he doesn't have.  As such - and I think a basic understanding of set theory
> supports this - no tag can do anything but remove permission.

This means, an empty or missing tag *grants* permission(s). Is this right?

Regards, Franco

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