The Chaocipher Clearing House
Progress Report #13
Mike Cowan submits research paper entitled "A new approach to revealing the Byrne machine"This afternoon I received a technical submission from Mike Cowan entitled "A new approach to revealing the Byrne machine".
It is a new approach to attacking the Chaocipher, using the
plethora of known plain and cipher text letters found in Exhibit #1.
Assuming the underlying system uses two cipher disks, Mike
proposes determining the mixed disk alphabets in a novel fashion.
approach, both drawing on Jeff Hill's work and parallel to it,
holds the promise of breaking into Chaocipher in a novel way.
Highly recommended reading.
A C++ file of Mike's prototype program that illustrates the principles of the method can be downloaded from here.
(c) 2009 Moshe Rubin
Created: 29 July 2009
Updated: 2 September 2009