Signals intelligence in the Second World War/Related Articles
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- Intelligence collection management : Assigning questions to various collection techniques, reflecting the techniques available and the priority of the information need. Includes the process of categorizing information learned for subsequent analysis, and assigning probabilities of accuracy to the raw information
- Radar : (acronym for "radio detection and ranging") A technique used for detecting and tracking targets, navigation, imagery, and special applications.
- Radio : Transmission and reception of information, which can be voice, data or imagery over electromagnetic radiation in free space (i.e., wireless). The information is modulated onto a carrier wave
- Telephony : Add brief definition or description
- Arlington Hall : Former girls' school in Arlington, Virginia, taken over for signals intelligence work in the Second World War and used for many years by the Defense Intelligence Agency and U.S. Army intelligence; now occupied by the National Foreign Affairs Training Center and the National Guard Bureau
- : Second World War location of the main British signals intelligence organization, the Government Code and Cipher School
- Enigma machine : The primary high-security cryptographic communications security machine of Nazi Germany. Unknown to the Germans, it had been substantially cryptanalyzed by the British Government Code and Cipher School, with French, Polish, and U.S. help.
- Government Code and Cipher School : World War II cover name for the British signals intelligence organization; now the Government Communications Headquarters
- William Friedman : Possibly the greatest cryptologist in history, he pioneered the application of mathematics to cryptanalysis and built the U.S. Army Signal Intelligence Service technical base.
- Dilwyn Knox : Add brief definition or description
- OP-20G : Signals intelligence organization of the U.S. Navy in the Second World War; its Army counterpart was the Signals Intelligence Service
- Joseph Rochefort : Add brief definition or description
- Signals Intelligence Service : U.S. Army organization for signals intelligence in the Second World War; its Navy counterpart was OP-20G
- Alan Turing : British mathematician, code breaker and computer pioneer.
- ULTRA : ULTRA was the main code word, in the Second World War, for British signals intelligence directed at Nazi Germany.
- Battle of the Atlantic : A major campaign to secure Anglo-American shipping routes in the face of German opposition, principally submarine but also involving long-range aircraft and commerce raiding; eventually won by Allied technology, organization and industrial production
- Communications act of 1934 : Add brief definition or description
- Cryptanalysis : The sub-field of cryptology which deals with breaking into existing codes and ciphers.
- Direction finding : Finding the location of an electromagnetic emitter, either by the crossed bearings from directional antennas from various known points, or by time of arrival or time difference of arrival of the signal at those points
- Goniometry : Add brief definition or description
- Radiofrequency MASINT : Collection and processing of intelligence information derived from unintentional electromagnetic radiation from targets of interest
- SIGINT before the Second World War : Add brief definition or description
- SIGINT from 1945 to 1989 : Add brief definition or description
- SIGINT from 1990 to the present : Add brief definition or description
- Traffic analysis : Traffic analysis is a branch of signals intelligence, inferring useful information from messages without actually reading them.
- VENONA : A long-running and highly secret collaboration between intelligence agencies of the United States and United Kingdom that involved the cryptanalysis of messages sent by several intelligence agencies of the Soviet Union.
- Wiretapping : Add brief definition or description