What must be signed back in after a mission to maintain COMSEC?

• A. COMSEC material back in
• B. Weapons back in
• C. Flight plan back in
• D. Passport back in

Answer: (A)

Maintaining COMSEC hinges on strict accountability for the material that protects secure communications. After a mission, every piece of COMSEC material must be returned and signed back in so the inventory shows nothing is missing or compromised. COMSEC material includes crypto devices, keying material, key lists, and related equipment used to secure communications. Signing the return creates a verifiable audit trail, making it possible to detect any loss or tampering immediately and prevent potential breaches. The other items listed aren’t COMSEC material and are handled through different procedures, so they don’t fulfill the requirement for COMSEC accountability.