Original: The Communications Security Establishment Canada (CSEC or CSE) (CSTC or CST) is the Canadian government's national cryptologic agency.
Simplified: The Communications Security Establishment Canada (CSEC or CSE) (French: Centre de la sÃ curitÃ des tÃ lÃ communications Canada) (CSTC or CST) is the Canadian government's national signals intelligence agency.