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New. New Book; Fast Shipping from UK; Not signed; Not First Edition; The M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition.
M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition by War Department
by War Department
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M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition
by War Department
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Periscope Film, LLC. Paperback. New. Paperback. 90 pages. Dimensions: 8.0in. x 5.0in. x 0.2in.Designed by Swedish cryptographer Boris Hagelin, the M-209 Converter was a portable, mechanical cipher machine. Used extensively during WWII and the Korean conflict by both the Army Signal Corps and the U. S. Navy (which designated it the CSP-1500), Hagelins device allowed a rapid and secure means of communication. The lunchbox- sized machine was so simple that little training was required to use it, yet its cipher scheme proved very difficult but not impossible for the Germans to crack. The M-209s elegant design uses six adjustable key wheels or rotors to produce a reciprocal substitution also known as a Beaufort cipher. The effect was that of sliding a normal alphabet sequence against the same sequence reversed, with a high degree of irregularity in the shifting process brought about by a train of gears. In the train of gears, the number of teeth on the driving number was also varied by the use of keying elements. Prepared by the War Department for the Signal Corps and other users, this M-209 technical manual was originally restricted, but is now considered declassified. It describes the operation and care of this fascinating device. This revised edition was originally printed in 1944 and contains several sections not found in earlier versions, including maintenance and parts information. It provides a fascinating glimpse into mid-level encryption technology circa 1944. This item ships from multiple locations. Your book may arrive from Roseburg,OR, La Vergne,TN.
- Bookseller BuySomeBooks (US)
- Format/Binding Paperback
- Book Condition New New
- Quantity Available 20
- ISBN 10 1937684695
- ISBN 13 9781937684693
- Publisher Periscope Film, LLC
- Keywords War Department,World War II
We have 2 copies available starting at $14.66.
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M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition
by War Department
- New
- Condition
- New
- ISBN 10 / ISBN 13
- 9781937684693 / 1937684695
- Quantity Available
- 698
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Uxbridge, Greater London, United Kingdom
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$14.66$7.99 shipping to
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Stock Photo: Cover May Be Different
M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition
by War Department
- New
- Paperback
- Condition
- New
- Binding
- Paperback
- ISBN 10 / ISBN 13
- 9781937684693 / 1937684695
- Quantity Available
- 10
- Seller
-
Southport, Merseyside, United Kingdom
- Item Price
-
$19.96$9.95 shipping to
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Description:
Paperback / softback. New.
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$9.95
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