Masked Dispatches - Cryptograms and Cryptology in American History, 1775-1900 (Paperback)

This is an examination of codes and ciphers as they figured in American History prior to the twentieth century, prior to the era of wireless or radio communication and the advent of the electronic age. It forms a backdrop for understanding modern cryptology and the role of cryptology in the growth of this nation. Cryptology, the art and science of code-making and code breaking, depends on the prevailing state of technology and the perception of threat.