ECHELON

ECHELON is a signals intelligence (SIGINT) collection and analysis network operated by the United States and its allied countries, known as the "Five Eyes": the United States, United Kingdom, Canada, Australia, and New Zealand. Established during the Cold War, ECHELON is designed to intercept and analyze electronic communications, including phone calls, emails, and internet traffic. The network employs a system of ground stations and satellites to capture a wide range of communications from various sources.