November 11, 2013
STATEROOM sites are covert SIGINT collection sites located in diplomatic facilities abroad. SIGINT agencies hosting such sites include SCS (at U.S> diplomatic facilities), Government Communications headquarters or GCHQ (at British diplomatic facilities), Communication Security Establishments or CSE (at Canadian diplomatic facilities), and Defense Signals Directorate (at Australian diplomatic facilities). These sites are small in size and in the number of personnel staffing them. They are covert, and their true mission is not known by the majority of the diplomatic staff at the facility where they are assigned.”