... Description of document: A History of U.S. Communications Security (Volumes I and II); ... ... Description of document: A History of U.S. Communications Security (Volumes I and II); the David G. Boak Lectures, National Security Agency, 19... ...ription of document: A History of U.S. Communications Security (Volumes I and II); the David G. Boak Lectures, National Security Agency, 1973 Req... ...: 23-December-2007 Released date: 10-December-2008 Posted date: 24-December-2008 Source of document: National Security Agency Attn: FOIA/PA ... ...our request of 23 December 2007 to have A History of U.S. Communications Security (2 volumes) by David G. Boak, Fort George G. Meade, MD National Secu... ...st of 23 December 2007 to have A History of U.S. Communications Security (2 volumes) by David G. Boak, Fort George G. Meade, MD National Security Agen... ...of them. Let's look at a couple of codes: 1. The simplest kind, called a "one-part code", simply lists the plaintext meanings alphabeti­ cally (so tha... ...9 RECEIVE codes-buttry to visualize some guy in aD operational environment sc:rambUng through 19 books to find the right one for a 1i\"8n incoming mes... ...velop some interim suppreBlicm measures for their product liDes, and the Committee published two lists: one contaiDing equipments which were for· bidd...

...This publication consists of a series of lectures prepared and given to interns and other employees by Mr. David G. Boak in 1966. Mr. Boak is uniquely qualified to discuss the history of the US COM_SEC because he has participated significantly in most...