ECHELON is a name used in
global media and in popular culture to describe a
signals intelligence (SIGINT) collection and analysis
network operated on behalf of the five signatory states
to the UKUSA Security Agreement.
(Australia, Canada, New
Zealand, the United Kingdom,
United States, known as
AUSCANNZUKUS or Five
The "Five Eyes", often
abbreviated as "FVEY", refer to an anglophonic alliance
comprising Australia, Canada, New Zealand, the United
Kingdom and the United States.
These countries are bound
by the multilateral UKUSA Agreement - a treaty for joint
cooperation in signals intelligence.