Mass intelligence-gathering systems

thumb|Cyberwarfare specialists of the United States Army's 782nd Military Intelligence Battalion (Cyber) supporting the [[3rd Brigade Combat Team, 1st Cavalry Division during a training exercise in 2019]]

thumb|right|upright|A radome at [[RAF Menwith Hill, a site with satellite uplink capabilities believed to be used by ECHELON]] thumb|right|RAF Menwith Hill, [[North Yorkshire, England]] thumb|right|Misawa Air Base Security Operations Center (MSOC), [[Aomori Prefecture, Japan]]

act of obtaining secrets and information using methods on the Internet, networks or individual computers

GhostNet () is the name given by researchers at the Information Warfare Monitor to a large-scale cyber spying operation discovered in March 2009. The operation is likely associated with an advanced persistent threat, or a network actor that spies undetected. Its command and control infrastructure is based mainly in the People's Republic of China and GhostNet has infiltrated high-value political, economic and media locations in 103 countries. Computer systems belonging to embassies, foreign ministries and other government offices, and the Dalai Lama's Tibetan exile centers in India, London and

measure used to restrict access to digital content by age

thumb|300px|right|A DGSE site in Domme, Périgord "Frenchelon" is the nickname given to the signal intelligence system operated by France. The name is a reference to its Anglo-American counterpart ECHELON.

cellular phone surveillance device

US government administrative subpoena

Mass surveillance project led by GCHQ