From: Jim Choate <ravage@ssz.com>
Date: Tue, 9 Sep 1997 12:42:32 +0800
To: cypherpunks@ssz.com (Cypherpunks Distributed Remailer)
Subject: Gao's Chaos Cryptosystem Algorithim (fwd)
Message-ID: <199709090442.XAA04016@einstein.ssz.com>
MIME-Version: 1.0
Content-Type: text



Forwarded message:

> From: "Nobuki Nakatuji" <bd1011@hotmail.com>
> Subject: Gao's Chaos Cryptosystem Algorithim
> Date: Mon, 08 Sep 1997 21:18:24 PDT

> P(i) Plaintext,C(i) Ciphertext,K(j) Key,Ch(i) Chaos signal,
> L Irrational number
> 
> 
> P(),C()-->Manage in byte,Length supposing that n byte.
> K()-->Character line from ASCII CODE,Length supposing that m.
> 
> 
> Ch(n)
> begin
> Xn+1=aXn(1.0-Xn)
> return Xn+1
> end
> 
> 
> f(K)
> begin
> w = Sigmaj strtoul(K(j))j
> 
> delay=int(w/L)
> return(double)(w/L-delay)
> end
> 
> 
> 1.K input
> 2.delay generato
> 3.Ch(i) generato
> 4.P(i) acquire
> 5.C(i)=P(i) XOR Ch(i+delay)
> 6.C(i) output

Nice but as noted by others, without a better explanation of what is going
on with Ch(i) the algorithm as detailed is useless.


    ____________________________________________________________________
   |                                                                    |
   |    The financial policy of the welfare state requires that there   |
   |    be no way for the owners of wealth to protect themselves.       |
   |                                                                    |
   |                                       -Alan Greenspan-             |
   |                                                                    | 
   |            _____                             The Armadillo Group   |
   |         ,::////;::-.                           Austin, Tx. USA     |
   |        /:'///// ``::>/|/                     http:// www.ssz.com/  |
   |      .',  ||||    `/( e\                                           |
   |  -====~~mm-'`-```-mm --'-                         Jim Choate       |
   |                                                 ravage@ssz.com     |
   |                                                  512-451-7087      |
   |____________________________________________________________________|