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Military cryptanalysis / by William F. Friedman.
Connect to full text Available online
View online- Format:
- Book
- Government document
- Author/Creator:
- Friedman, William F. (William Frederick), 1891-1969, author.
- Language:
- English
- Subjects (All):
- Ciphers.
- Cryptography.
- World War, 1939-1945--Military intelligence--United States.
- World War, 1939-1945.
- World War, 1939-1945--Cryptography--Sources.
- ciphers (codes).
- Military intelligence.
- United States.
- Genre:
- Online resources.
- Sources
- Physical Description:
- 1 online resource (4 volumes) : illustrations
- Place of Publication:
- Washington : United States Government Printing Office, 1939-1941.
- Contents:
- pt. 1. Monoalphabetic substitution systems
- pt. 2. Simpler varieties of polyalphabetic substitution systems
- pt. 3. Simpler varieties of aperiodic substitution systems
- pt. 4. Transportation and fractionating systems.
- Notes:
- Online resource, PDF version; title from title page (viewed November 1, 2016).
- Includes bibliographical references and indexes.
- At head of title: War Department. Office of the Chief Signal Officer, Washington.
- "Prepared under the direction of the Chief Signal Officer."
- "Declassified and approved for release by NSA on 09-19-2005 pursuant to E.O. 12958, as amended."
- Formerly restricted.
- OCLC:
- 610592396
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