The following documents detail the use of Cryptology inside the United States Intelligence Community.
Declassified Documents
A History of U.S. Communications Security Volume I [94 Pages, 3.18mb]
A History of U.S. Communications Security Volume II [61 Pages, 2.37mb]
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American Cryptology During the Cold War 1945-1989, Book I-IV
The Cryptology of the German Intelligence Services [38 Pages, 2.01mb]
German Clandestine Activities in South America in World War II [78 Pages, 4.80mb]
The Origins of the National Security Agency 1940-1952 [155 Pages, 9.83mb]
