Define OPSEC and provide one example of a protective measure.

• A. OPSEC is Operations Security; protecting sensitive information and activities from adversaries. Example: limiting mission details on public channels.
• B. OPSEC is Operational Strategy and Execution; planning for maximum rapid deployment.
• C. OPSEC is Operational Security and Evaluation; rating units on security posture.
• D. OPSEC is Organization and Personnel Safety; improving on-site safety measures.

Answer: (A)

OPSEC stands for Operations Security, focusing on protecting sensitive information and activities from adversaries by controlling what is shared. The core idea is to identify information that, if exposed, could reveal vulnerabilities or plans, and to put measures in place to prevent that exposure. A practical protective measure is limiting mission details in public channels—sharing only what's necessary and through approved channels, and avoiding posting timing, locations, or capabilities that could be exploited. This directly reduces what an adversary can learn and undermines their ability to threaten the operation.

The other descriptions drift away from protecting information from outsiders. They either redefine OPSEC in a way that misses the security focus, describe planning for rapid deployment, or talk about evaluating security posture or on-site safety rather than safeguarding information from adversaries.