NSA Lectures on Communications Security from 1973
Newly declassified: “A History of U.S. Communications Security (Volumes I and II),” the David G. Boak Lectures, National Security Agency (NSA), 1973. (The document was initially declassified in 2008. We just got a whole bunch of additional material declassified. Both versions are in the document, so you can compare and see what was kept secret seven years ago.)
keiner • November 25, 2015 7:51 AM
..start with page 155 (of .pdf) FUN!