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{{r|Government Communications Headquarters||**}}

...lligence Service]]. Eventually, GCCS became a separate organization, the [[Government Communications Headquarters]], with functions similar to the Canadian [[Communications Security Establi

...ned solely with the technical matters under the jurisdiction of the U.K. [[Government Communications Headquarters]] (GCHQ) or U.S. [[National Security Agency]]. Instead, the functions were

...g democracies — the US [[National Security Agency]] (NSA), British [[Government Communications Headquarters]] (GCHQ), Canadian [[Communications Security Establishment]], Australia's [

...itish forces in World War II came under the code name "ULTRA" managed from Government Communications Headquarters| the former Government Code and Cypher School (Bletchley Park).

...the [[Government Code and Cypher School]] at [[Bletchley Park]], now the [[Government Communications Headquarters]]). Lack of centralization bothered these allies. The vital British-US coo

...ors have had a very close relationship with its British Counterpart, the [[Government Communications Headquarters]] (GCHQ). The resident U.S. representative there, the Senior U.S. Liaison | [[Government Communications Headquarters]] (GCHQ)