by Phillip Holdridge (Author)
The National Security Agency took over responsibility for all U.S. Government encryption systems when it was formed in 1952. The technical details of most NSA-approved systems are still classified, but much more about its early systems have become known and its most modern systems share at least some features with commercial products.
Number of Pages: 128
Dimensions: 0.27 x 11.02 x 8.5 IN
Publication Date: November 11, 2015