The Chaocipher Clearing House

Progress Report #20

Moshe Rubin (

Mike Cowan submits a new paper: "Chaocipher: Solving Exhibits 1 and 4"

The Chaocipher Clearing House is happy to host Mike Cowan's latest paper.  The paper, entitled "Chaocipher: Solving Exhibits 1 And 4", presents his computer methods for solving the underlying plaintexts and starting alphabets of Exhibit 1 and 4 in "Silent Years".

The paper includes appendices with C source code for discovering the starting alphabets given plaintext and ciphertext, for rewinding the alphabets backwards, and a genetic algorithm for discovering the key phrase used to prime the initial starting alphabets.

Copyright (c) 2010 Moshe Rubin
Created: 18 December 2010

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