Department of National Defence (Canada): Encyclopedia - Communications Security EstablishmentThe Communications Security Establishment (CSE) is an intelligence agency of the Canadian government, charged with the duty of keeping track of foreign signals intelligence. Part of the Department of National Defence, CSE is forbidden, by law, to intercept domestic communications. When intercepting communications between a domestic and foreign source, the domestic communications are destroyed or otherwise ignored (however, after the September 11, 2001 attacks on the United States, the CSE's powers expanded to allow the the inte ...
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