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Signals intelligence (SIGINT) is the act and field of 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). [1]
SIGINT is the analysis of intentional signals for both communications and non-communications (e.g., radar) systems, while MASINT is the analysis of unintentional information, including, but not limited to, the electromagnetic signals that are the main interest in SIGINT.
The SIGILL signal is sent to a process when it attempts to execute an illegal, malformed, unknown, or privileged instruction. SIGINT The SIGINT signal is sent to a process by its controlling terminal when a user wishes to interrupt the process.
Signals intelligence is information about targets obtained from electronic signals and communications from those targets such as phone calls, texts, radio waves and other things that create ...
Signals intelligence (SIGINT) are gathered from interception of signals. Communications intelligence (COMINT); Electronic intelligence (ELINT) – gathered from electronic signals that do not contain speech or text (which are considered COMINT)
Signal collectors, which concentrate the energy, as with a telescope lens, or a radar antenna that focuses the energy at a detector; Signal detectors, such as charge-coupled devices for light or a radar receiver; Signal processing, which may remove artifacts from single images, or compute a synthetic image from multiple views; Recording mechanism
The increased communications activity, according to the history, was so striking that Allen W. Dulles, the Director of Central Intelligence and head of the intelligence community, personally went to President John F. Kennedy, in January 1961, to brief him on the increase. SIGINT and the Attempted Coups against Diem, 1960–1962
The Government Communications Security Bureau (GCSB) is responsible for signals intelligence and was established in 1977, with responsibility for Communications and Technical Security as well as SIGINT. Computer security (COMSEC) responsibilities were added later.