Secret and Urgent: The Story of Codes and Ciphers

By Fletcher Pratt and Fletcher Pratt -

Book Overview

This is a reproduction, without changes, of a classic text in cryptographic literature. Fletcher Pratt has written an outstanding light- reading book concerning classical cryptography and... This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: B0007DRU3A
• Release Date: January 1942
• Publisher: Blue Ribbon Books
• Length: 282 Pages
• Weight: 0.95 lbs.