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  • UNITED STATES DIPLOMATIC CODES AND CIPHERS, 1775-1938
    ebook
    UNITED STATES DIPLOMATIC CODES AND CIPHERS, 1775-1938
    RALPH E. WEBER
    United States Diplomatic Codes and Ciphers, 1775-1938 is the first basic reference work on American diplomatic cryptography. Weber's research in national and private archives in the Americas and Europe has uncovered more than one hundred codes and ciphers. Beginning with the American Revolution, these secret systems masked confidential diplomatic correspondence and reports.Duri...

    $1,620.00

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