National Security Agency: Cryptographic Math of Enigma

The Cryptographic Mathematics of Enigma. By: Dr. A. Ray Miller 

The Enigma cipher machine had the confidence of German forces who depended upon its security. This misplaced confidence was due in part to the large key space the machine provided. This paper derives for the first time the exact number of theoretical cryptographic key settings and machine configurations for the Enigma cipher machine. It also calculates the number of practical key settings Allied cryptanalysts were faced with daily throughout World War II. Finally, it shows the relative contribution each component of the Enigma added to the overall strength of the machine.   This is an excellent 20 page non-fiction publication with an amazing amount of fascinating facts and photographs. This is truly a must have for those collecting NSA memorabilia. There is No Reserve on this item.  Please email me with any questions. Winning buyer agrees to pay final bid amount plus shipping, handling and insurance cost if insurance is desired. Thank you for looking and good luck with your bidding.