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M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition by W...
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Kostenlos USPS Media MailTM.
Standort: Jessup, Maryland, USA
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eBay-Artikelnr.:388275330066
Artikelmerkmale
- Artikelzustand
- ISBN
- 9781937684693
Über dieses Produkt
Product Identifiers
Publisher
Periscope Film, LLC
ISBN-10
1937684695
ISBN-13
9781937684693
eBay Product ID (ePID)
168590359
Product Key Features
Book Title
M-209 Converter Encryption Machine Technical Manual 1944 Revised Edition
Number of Pages
92 Pages
Language
English
Topic
Military / World War II
Publication Year
2012
Genre
History
Format
Trade Paperback
Dimensions
Item Height
0.2 in
Item Weight
3.5 Oz
Item Length
8 in
Item Width
5 in
Additional Product Features
Synopsis
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), Hagelin's 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-209's elegant design uses six adjustable key wheels or rotors to produce a reciprocal substitution - also known asa 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 severalsections not found in earlier versions, including maintenance and parts information. It provides a fascinating glimpse into mid-level encryption technology circa 1944.
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Great Book Prices Store
98% positive Bewertungen•1.4 Mio. Artikel verkauft
Angemeldet als gewerblicher Verkäufer
Verkäuferbewertungen (411'149)
- u***n (25)- Bewertung vom Käufer.Letzter MonatBestätigter KaufThis unique book was priced quite reasonable. The book was advertised as new and arrived in mint condition and in the highest authentic hard cover quality. It Packaging was very good when mailed. I also find communicating with the seller during the shipping process, which was a bit of a wait for a very hard to find book, was very prompt and inspired trust. I highly recommend this seller and will return for future purchases.
- e***r (2735)- Bewertung vom Käufer.Letzte 6 MonateBestätigter KaufAAA+++; Excellent Service; Great Pricing; Fast Delivery-Faster Than Expected to Chicago using free shipping USPS Media Mail, Received 06/18; book in Great Condition as Described ; TLC Packaging; Excellent Seller Communication, Sends updates . Highly Recommended!, Thank you very much!
- f***f (1670)- Bewertung vom Käufer.Letzter MonatBestätigter KaufExcellent Seller, Goes the Extra Mile. The Seller Was Incredibly Communicative. Smooth Transaction, Shipped Very Quickly, As Advertised; Good Price; Well Packaged & Delivered Within a Few Days. Item in Described Promised Condition, Thank You Very Much!!!!!!!!!!! A+