[e-lang] A PictureBook of Secure Cooperation
markm at cs.jhu.edu
Wed Mar 30 07:08:54 EST 2005
Fred Spiessens wrote:
> I reread the slide and I see now that you mean what you said: the
> revoker does not provide any "actual" file authority. I disagree:
> revocation-authority should still be considered actual authority over
> the file, as it can not only influence who can access the file but
> indirectly also the content of the file.
A very interesting, and somewhat counter-intuitive, consequence of our
definition of authority. I think this shows a strength of our definition
rather than a weakness -- the counter-intuitive issue highlighted here is a
real issue, which is otherwise easily missed.
However, it also makes me itch for some new distinction intermediate between
permission and authority, in order to enable MarcS to say clearly and
precisely what he was originally trying to say.
Text by me above is hereby placed in the public domain
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