From: jkreznar@ininx.com (John E. Kreznar)
Date: Thu, 24 Mar 94 20:58:22 PST
To: mpd@netcom.com
Subject: Digital Cash
In-Reply-To: <199403242239.OAA00431@mail.netcom.com>
Message-ID: <9403250506.AA02358@ininx>
MIME-Version: 1.0
Content-Type: text/plain


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> Quite a bit of work has already been done on this concept.
> Basically one generates a very large sequence of machine
> instructions which computes the image of the output of an
> algorithm under a strong cipher from the image of the input under
> the cipher.  A controlled amount of redundant information is
> added to both the input and output.  This yields a piece of code
> so obtuse and complex that nothing may be gleaned about what
> algorithm it is executing by observing it run.  Figuring out what
> it actually is doing is a cryptanalytically hard problem.  Also,
> determining a way of modifying the code which does not break it
> is a similarly hard problem.

> Once encased in such a module, an algorithm may be distributed
> with no fear that it will be stolen.  This raises interesting
> poblems with software patents, since one can not tell from such a
> module whether it is performing a function in a way which
> infringes.

Fascinating!!  Almost unbelievable!

Can you provide references?

	John E. Kreznar		| Relations among people to be by
	jkreznar@ininx.com	| mutual consent, or not at all.

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