West traces the origins of British signals intelligence and details developments up to the present. Annotation copyrighted by Book News, Inc., Portland, OR

From LORENZ to ENIGMA, Room 40 to Bletchley, SIGINT reveals the story of the secret signals of both world wars

The National Security Agency is the world’s most powerful, most far-reaching espionage. Now with a new afterword describing the security lapses that preceded

In recent years the importance of Signals Intelligence (Sigint) has become more prominent, especially the capabilities of reading and deciphering diplomatic, mi