Which option best describes a protective measure under OPSEC?

• A. Disseminating all mission details on public channels to ensure transparency.
• B. Posting unit movement schedules in unit newsletters.
• C. Implementing OPSEC practices such as restricting mission details on public channels.
• D. Ignoring sensitive information during planning.

Answer: (C)

OPSEC centers on preventing adversaries from learning information that could give them an advantage. The protective measure here is to restrict mission details to authorized personnel and use secure, private channels for sharing sensitive information. By limiting what is shared in public or easily accessible places, you reduce the risk that someone outside the team can piece together plans, timing, or locations.

Using restricted or need-to-know disclosure keeps critical information out of sight from potential observers. This means redacting unnecessary details, sharing only what is essential, and using encrypted or official channels for communication. These practices directly reduce exposure and help maintain operational security.

Disseminating all mission details publicly, posting movement schedules in public or semi-public venues, or ignoring sensitive information during planning would all increase risk by making it easier for an opponent to anticipate actions or exploit gaps in awareness. The protective approach focuses on controlling information flow to preserve safety and mission success.