[Infowarrior] - 1918 Chaocipher Revealed

[Richard Forno]

CHAOCIPHER REVEALED: THE ALGORITHM
Moshe Rubin © 2 July 2010

ADDRESS: Rechov Shaulson 59/6, Jerusalem 95400 ISRAEL; mosher at mountainvistasoft.com.

ABSTRACT: Chaocipher is a method of encryption invented by John F. Byrne in 1918, who tried unsuccessfully to interest the US Signal Corp and Navy in his system. In 1954, Byrne presented Chaocipher-encrypted messages as a challenge in his autobiography “Silent Years”. Although numerous students of cryptanalysis attempted to solve the challenge messages over the years, none succeeded. Chaocipher has been a closely guarded secret known only to a handful of persons. Following fruitful negotiations with the Byrne family during the period 2009-2010, the Chaocipher papers and materials have been donated to the National Cryptologic Museum in Ft. Meade, MD. This paper presents the first full disclosure and description of Byrne’s Chaocipher algorithm......

http://www.ciphermysteries.com/2010/07/03/the-chaocipher-revealed