Breaking Japanese Diplomatic Codes: David Sissons and D Special Section During the Second World WarDesmond Ball, Keiko Tamura During the Second World War, Australia maintained a super-secret organisation, the Diplomatic (or `D’) Special Section, dedicated to breaking Japanese diplomatic codes. The Section has remained officially secret as successive Australian Governments have consistently refused to admit that Australia ever intercepted diplomatic communications, even in war-time. This book recounts the history of the Special Section and describes its code-breaking activities. It was a small but very select organisation, whose `technical’ members came from the worlds of Classics and Mathematics. It concentrated on lower-grade Japanese diplomatic codes and cyphers, such as J-19 (FUJI), LA and GEAM. However, towards the end of the war it also worked on some Soviet messages, evidently contributing to the effort to track down intelligence leakages from Australia to the Soviet Union. |
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Breaking Japanese Diplomatic Codes: David Sissons and D Special Section ... Desmond Ball,Keiko Tamura No preview available - 2013 |
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alphabet Annex Appendix April Archer Army Arthur Dale Trendall ASWG August Australian Army Australian National University Barnes bigrams blanks Bond Bonegilla breaking Central Bureau code groups codes and cyphers consonant Cooper copies cryptographic cypher system cypher text David Sissons December decryption Defence Signals Directorate Desmond Ball digits diplomatic messages Diplomatic Section Director of Military East Asia Ministry encoded encyphering February figures five-figure groups Foreign Office FRUMEL FUJI GC&CS GEAM Germany Greater East Asia Ian Smith indicator intercepts Japan Japanese Diplomatic Cyphers Japanese diplomatic traffic July June Kuibyshev letter Lieutenant London Melbourne Military Intelligence Monterey National Archives Naval Navy November October organisation pattern plaintext Professor recyphering tables represents Ep row order Russia sent SIGINT signals Soviet Special Intelligence Section Special Section Special Wireless Section staff substitution telegram Tokyo transposition cypher Trendall Trendall's Treweek Victoria Barracks vowel Wireless Group