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[[World War II]] cover name for the British signals intelligence organization; now the Government Communications Headquarters

Signals intelligence variant of the [[BaE Systems Nimrod]] aircraft, flown by the [[Royal Air Fo

An unconfirmed intelligence collection technique, mixing aspects of signals intelligence and radiofrequency MASINT, in which a sensitive information signal inadvert

...[[New Zealand]], which has responsibility for [[information security]] and signals intelligence

Signals intelligence collection variant of [[S-3 Viking]]; intended as a carrier battle group ra

Signals intelligence variant of [[P-3 Orion]] [[maritime patrol aircraft]]; slower than Air Forc

Signals intelligence satellite primarily focused on Soviet missile testing; part of the [[nation

{{r|Foreign instrumentation signals intelligence}}

...m|code word]], in the [[Second World War]], for [[United Kingdom|British]] signals intelligence directed at [[Nazi Germany]].

A U.S. plan, in the late fifties and early sixties, to increase signals intelligence capabilities in Southeast Asia and especially [[South Vietnam]]

[[United States Navy]] pilot of [[EP-3 Aries II]] signals intelligence aircraft in a mid-air collision with a Chinese fighter; landed the damaged

...off the Chinese and Vietnamese coasts in the early to mid 1960s, carrying signals intelligence sensors and technicians

It not only did signals intelligence and [[information assurance]] as do the [[Australia|Australian]] [[Defense ...B]]. Some functions, such as the Border Guards and the briefly independent signals intelligence/[[information assurance]] agency best known as FAPSI, have been, under [[Vl

A subset of [[foreign instrumentation signals intelligence]], which captures and interprets engineering [[telemetry]] transmitted from

An aging U.S. Navy land-based signals intelligence aircraft, somewhat similar in function to the faster RC-135 RIVET JOINT and

{{r|Signals intelligence in the Second World War}}

====Signals intelligence====

...en Elizabeth I. During the [[Second World War]], it controlled the British signals intelligence organization, then the Government Code and Cipher School (now the Governmen

...who has authority over the military services' [[information security]] and signals intelligence units. ...areer employee, an executive staff, and then two principal chiefs, one for signals intelligence and the other for information security.

...e CIA, with directorates including operations and intelligence, as well as signals intelligence.<ref name=Coll>{{citation