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  • All fields: 07-31-2007
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    • American cryptology during the Cold War, 1945-1989

    • United States. National Security Agency--History.; Electronic surveillance--United States.; Intelligence service--United States.; Cryptography--United States--History.; Cold War.
    • Top Secret Umbra, excised copy. Approved for release by NSA on 07-31-2007, FOIA case #40186.; Preserved in the OCLC Digital Archive. Harvested from http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB260/nsa-1.pdf,...

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