Breaking "Tirpitz": Cryptanalysis of the Japanese-German joint naval cipher. Issue 5 (2nd September 2016)

• Record Type: Journal Article
• Authors: Girard, Daniel J.
• Is Part Of: Cryptologia. Volume 40:Issue 5(2016)
• Page Start: 428
• Page End: 451
• Publication Date: 2016-09-02
• Subjects: cryptanalysis -- Enigma -- Japanese-German joint communications -- JN-18 -- JNA-1 -- OP-20-G -- "Opal" -- "throw-on" -- "Tirpitz"; Cryptography -- Periodicals; 652.8
• DOI: 10.1080/01611194.2015.1087073
• Languages: English
• ISSNs: 0161-1194

Abstract

ABSTRACT: This article gives the solutions of the only four messages known to still exist from the previously unbroken Japanese-German joint naval radio communications traffic in the system known as " Tirpitz, " which used the specially-designed model T Enigma machine. It also explains the methods used by the author to break the messages, and gives some background on the model T Enigma and its usages.