![]() ![]() There were different requirement for search radar and for the different area defense and point defense missile systems, and how these guided the Suppression of Enemy Air Defense ( SEAD) attacks on the radars, command centers, and missiles. There are, however, some techniques that can apply to either branch, as well as to assist FISINT or MASINT.Īn excellent Australian analysis of how the pieces came together, from targeting to physical destruction of radars, in Operation DESERT STORM was written by Carlo Kopp. The two main ones are COMmunications INTelligence ( COMINT) and ELectronic INTelligence ( ELINT). If MASINT cannot identify the signal, then the intelligence organization may task an IMINT aircraft or satellite to take a picture of the source, so photointerpreters can try to understand its functions.īeing a broad field, SIGINT has many sub-disciplines. A nonspecific SIGINT sensor can cue a Frequency Domain MASINT sensor that can help identify the purpose of the signal. An ELINT sensor may find a radar, and then cue (i.e., guide) a COMINT sensor for listening in on the talk between the radar and its remote users. That part should be considered in combination with MASINT, which is closely linked to foreign instrumentation such as telemetry or radionavigation. The JCS definition may overemphasize "foreign instrumentation signals". Intelligence derived from communications, electronic, and foreign instrumentation signals.".A category of intelligence comprising either individually or in combination all communications intelligence (COMINT), electronic intelligence (ELINT), and foreign instrumentation signals intelligence, however transmitted.In the United States of America and other nations involved with NATO, SIGINT is defined as More technical definitions of SIGINT and its branches The Boers had captured some British radios, and, since the British were the only people transmitting at the time, had signals rather obvious to intercept. Electronic interception appeared as early as 1900, during the Boer War. A simple encryption system, for example, is the Caesar cipher. Intercepting written but encrypted communications, and extracting information, probably did not wait long after the development of writing see cipher, and a more technical discussion under cryptography. However, traffic analysis-the study of who is signalling whom and in what quantity-can often produce valuable information, even when the messages themselves cannot be decrypted.Īs a means of collecting intelligence, SIGINT is a subset of intelligence collection management, which, in turn, is a subset of intelligence cycle management. As sensitive information is often encrypted, SIGINT often involves the use of cryptanalysis. Signals intelligence, often abbreviated SIGINT is an intelligence collection discipline based on interception of signals, usually electromagnetic, between people (i.e., COMINT or communications intelligence) or between machines (i.e., ELINT or electronic intelligence), or mixtures of the two. 4.5 Protection against side channel attacks and covert channels.4.4 Protection against compromising emanations. ![]() 2.2 Need for multiple, coordinated receivers.2 Disciplines Shared across the Branches.1 More technical definitions of SIGINT and its branches. ![]()
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