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Table of Contents
Communications and Sigint
Japanese Expansion 1895-1941
The GCCS 1919-1941
William Friedman and the US Army
Early American Naval Sigint
Developments in Australia
Preparedness for Attack?- Major Technical Encryption Systems
JN-25 and its Cryptanalysis
Using Common Book Groups
Recovery of a Code Book
Breaking Additive Systems
Making Additive Systems Secure
Redundant Encryption
The Scanning Distribution
Ciphers and the Submarines
Central Bureau 1942-1945
Organisation and Reorganisation
Security, Censorship and Leaks
Conclusion
From Pearl Harbor to Midway
Guadalcanal and Papua
Rabaul and the Philippines.
Japanese Expansion 1895-1941
The GCCS 1919-1941
William Friedman and the US Army
Early American Naval Sigint
Developments in Australia
Preparedness for Attack?- Major Technical Encryption Systems
JN-25 and its Cryptanalysis
Using Common Book Groups
Recovery of a Code Book
Breaking Additive Systems
Making Additive Systems Secure
Redundant Encryption
The Scanning Distribution
Ciphers and the Submarines
Central Bureau 1942-1945
Organisation and Reorganisation
Security, Censorship and Leaks
Conclusion
From Pearl Harbor to Midway
Guadalcanal and Papua
Rabaul and the Philippines.