Chapter 1. Lecture I
The objective of this series of lectures is to create an awareness of the background, development, and manner of employment of a science that is the basis of a vital military offensive and defensive weapon known as CRYPTOLOGY, a word that comes from the Greek kryptos, meaning secret or hidden, plus logos, meaning knowledge or learning. Cryptology will be specifically defined a little later; at the moment, however, I'm sure you know that it has to do with secret communications.
Let me say at the outset of these lectures that I may from time to time touch upon matters that are perhaps essentially peripheral or even irrelevant to the main issues, and if a defense is needed for such occasional browsing along the byways of the subject, ...
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