Signals intelligence | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-01-14

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Signals_intelligence


00:00:48 1 History
00:00:57 1.1 Origins
00:02:06 1.2 Development in World War I
00:05:54 1.3 Postwar consolidation
00:07:24 1.4 World War II
00:09:41 2 Technical definitions
00:10:36 3 Disciplines shared across the branches
00:10:46 3.1 Targeting
00:11:42 3.2 Need for multiple, coordinated receivers
00:13:08 3.3 Intercept management
00:16:09 3.4 Signal detection
00:18:03 3.4.1 Countermeasures to interception
00:18:31 3.5 Direction-finding
00:20:34 3.6 Traffic analysis
00:23:31 3.7 Electronic order of battle
00:28:33 4 Communications Intelligence
00:30:41 4.1 Voice interception
00:31:53 4.2 Text interception
00:32:33 4.3 Signaling channel interception
00:33:24 4.4 Monitoring friendly communications
00:37:46 5 Electronic signals intelligence
00:39:27 5.1 Complementary relationship to COMINT
00:41:00 5.2 Role in air warfare
00:42:37 5.3 ELINT and ESM
00:44:05 5.4 ELINT for meaconing
00:44:28 5.5 Foreign instrumentation signals intelligence
00:45:08 5.6 Counter-ELINT
00:45:34 6 SIGINT versus MASINT
00:48:13 7 Legality



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SUMMARY
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Signals intelligence (SIGINT) is intelligence-gathering by interception of signals, whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly used in communication (electronic intelligence—abbreviated to ELINT). Signals intelligence is a subset of intelligence collection management.
As sensitive information is often encrypted, signals intelligence in turn involves the use of cryptanalysis to decipher the messages.  Traffic analysis—the study of who is signaling whom and in what quantity—is also used to derive information.