Gerard Freriks wrote:
> Date: Fri, 28 Jun 1996 23:51:50 +0100
> Subject: Re: Computer system problems and testing approaches
This is me (Mike Wells, from an earlier message)
> > Almost certainly correct. We do not want one program that does all
> > these. We want lots of little programs that do one each, BUT (a BIG
> > BUT, bigger than any type face I can find) we also want an unerlying
> > system which allows us to move information between these
> > applications. And it is there that our troubles start. We expect his
> > underlying information moving engine to allow ANY acceptable
> > movement between applications, or more accurately between an
> > application/user pairing and any other, while preventing ALL
> > non-acceptable information movements. Even if we had a means of
> > specifying or enumerating what these accepatable movements are, I
> > doubt very much that we could specify and then build in a totally
> > correct (by which I think I mean provably correct) way, the engine to
> > do the job.
> >........................................
To which Gereard responds:
>
>
> Mike, it is here that you must take a quantum leap. Make the paradigmshift.
> There are standards to transmit physical things like currents, voltages,
VERY BIG SNIP
>
> The vehicle for adding meaning could be SGML.
>
and another BIG SNIP
Gerard outlines a method (one of several) to solve the technical
problem of interpreting data after it has been transmitted. That was
NOT the question I posed. The question was 'How do we define the set
of acceptable inter changes between pairs of (user,Application)
pairings; that is how do we define who can see what data?' Until we
have that, we can only implement either a VERY flexible mechanism,
and live with the security hazards, or a very rigid mechanism, and
live with the fact that people with perfectly proper reasons for
wishing to access data cannot do so.
Mike Wells
==========================================================
Professor Mike Wells
Department of Physics, The University of Leeds
Leeds LS2 9JT, United Kingdom
Phone: 0113-233-2339 E-Mail [log in to unmask]
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