Advanced Military Cryptography Book

The use of secret communications by means of coded messages has been a practice throughout ancient and modern history. In recent wars, messages were sent in alphabet cipher to ensure that the messages would not be read if they fell into enemy hands. This type of cipher is still used today. Codes and ciphers were used by generals, kings and even presidents to plan battles and to transmit important information. George Washington established a spy system to report on the British forces and their movements. To send such important information, each spy had a code book that contained code numbers, each number representing a specific word. A written coded message consisting of a series of numbers would be used to transmit the secret intelligence gathered.

For many, the ideas of cryptography and cryptoanalysis have been fascinating areas for study and recreation. The whole point of cryptography is to solve problems. The type of problems that cryptography solves revolve around secrecy, security and privacy. The Advanced Military Crytography Book presents various basic cryptographic principles and the fundamentals of secret communication by describing and illustrating the traditional cryptographic techniques designed before the computer age. Computer programmers will enjoy these algorithms and methods.

Topics covered in the TM 11-485, Advanced Military Crytography Book:

Transposition Systems
- Monophase transposition systems
- Polyphase transposition systems
- True double transposition
- Grids and other types of matrices
- Miscellaneous transposition systems
Substitution System
- Polygraphic Systems
- Checkerboard digraphic substitution
- Complex substitution systems
Repetitive and Combined Systems
- Repetitive Systems
- Combined substitution-transposition system
Cryptographs and Cipher Machines
- Cryptographs
- The obsolete U.S. Army cipher device, type M-94
- Cipher machines
Code Systems
- Code systems in general
- Enciphered code

This is an exact high-quality reprint of the original 1944 book. Nothing has been added or deleted.

The Advanced Military Cryptography Book is $19.95 plus $3.00 Shipping. Check, money order or credit cards accepted. (Mastercard, Visa, Discover)

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