History of Codes and Ciphers in the United States During World War Iby Wayne G. Barker
This historical book, written by historians of the Army Security Agency, covers the renaissance period of American cryptography. Text includes photo-reproductions of many American military codes used during World War I, instructions for their use, cryptographic reports, etc., and the solution of a previously unsolved historical problem, as well as the reconstruction of a code used by President Woodrow Wilson for his personal correspondence. The book discusses in some depth the founding of the Cipher Bureau (MI-8). This secret organization, founded by Herbert O. Yardley, later became known as the American Black Chamber. Text includes an index.
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