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Riverbank Publications No. 20 Several Machine-Ciphers and Methods for Their Solution
Riverbank Laboratories Department of Ciphers, Riverbank, Geneva Ill 1918 - First Edition. [2], [1]-58, [28] pages 28.5 cm. Provided in the originally issued Riverbank Laboratories button and string flapped manila envelope with limitation number on outside. Individually numbered limitation of 200 copies (so stated on copyright page). Stiff tan publisher's wraps with cover titles duplicating title page and hinges reinforced with linen tape (as issued). Publisher's envelope dusty with bumped corners, internal publication nice and clean. Last 28 pages comprise 'Synoptic Tables for the Star Cipher', which was also made available by Riverbank as a separate publication. First impression (this volume was also issued in a second impression). Wraps. A restricted publication not publically available when issued, it appears in a few institutional collections, but is rarely found on the market. 'Friedman amplified the de Viaris solution of the Bazeries cryptograph to which he gave the generic name of a "multiplex" system, and devised a solution for the Wheatstone cryptography, perhaps based on his work with he Pletts device.' (Kahn) Authorship attribution from Galland. [ Methods and examples of Deciphering] See J.S. Galland, An Historical and Analytical Bibliography of Cryptology, page 68. See also Kahn, The CodeBreakers, 1996, p376, Shulman, An Annotated Bibliography of Cryptography, 1976, p82. [Attributes: First Edition; Soft Cover]
      [Bookseller: Kuenzig Books ( ABAA / ILAB )]
Last Found On: 2018-01-09           Check availability:      AbeBooks    

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