From: pcw@access.digex.net (Peter Wayner)
Date: Thu, 25 Jan 1996 02:10:06 +0800
To: cypherpunks@toad.com
Subject: "Concryption" Prior Art
Message-ID: <v02130500ad2bb2004086@[199.125.128.5]>
MIME-Version: 1.0
Content-Type: text/plain



I haven't read the supposed Concryption patent so I don't know
what the claim structure is. But if they truly claim the right
to do encryption and compression simultaneously, then I've got
some prior art that should knock out such a broad claim. The
paper is "A Redundancy Reducing Cipher" (Cryptologia, May 88).
It's not very secure, but it does do some manner of encryption
at the same time as compressing a file with a Huffman-like
system. The journal is found in many university libraries so it
should be easy to produce a solid counterclaim.

If anyone has the plaintext to the Concryption patent (5479512),
I would like to read it.

-Peter