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Masked Dispatches: Cryptograms and Cryptology in American History, 1775-1900

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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 (notwithstanding
its traditional secrecy) in the growth
of this nation.

Kindle Edition

Published September 12, 2014

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National Security Agency

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