Communications Security Establishment

The Communications Security Establishment (CSE; French: Centre de la sécurité des télécommunications, CST) is Canada's national cryptologic intelligence and security agency. It is responsible for foreign signals intelligence, conducting cyber operations, cyber security and information assurance, and providing technical and operational assistance to the military, federal law enforcement, and other security agencies.

Source: Wikipedia — Communications Security Establishment (CC BY-SA 4.0)