OPSEC is a systematic proven process to identify control and protect classified information about a mission operation or activity and thus denying mitigating adversary's ability to compromise
What are the elements of threat
Which step in the OPSEC process is a decision making step because it helps the decision maker prioritize and decide whether or not to apply a countermeasure
Specific facts about friendly intentions, capabilities, and operations vitally needed by adversaries to plan and act effectively is called