ECHELON is a name used in global media and in popular culture to describe a signals ntelligence (SIGINT) collection and analysis network operated on behalf of the five signatory states to the UK–USA Security Agreement ( Australia, Canada, New Zealand, the United Kingdom, and the United States, known as AUSCANNZUKUS or Five Eyes).[It has also Kingdom, and the United States, known as AUSCANNZUKUS or Five Eyes). It has also been described as the only software system which controls the download and dissemination of the intercept of commercial satellite trunk communications