COMSEC addresses?

• A. Security of communications, including cryptographic material, encryption, and safeguarding information in transit.
• B. Physical plant safety and fire protection.
• C. Personnel background checks and vetting.
• D. Public relations and media communication.

Answer: (A)

COMSEC is about protecting the security of communications. It focuses on keeping messages confidential and their integrity intact by protecting the cryptographic materials and the processes that secure them. In practice, this means safeguarding cryptographic keys and devices, ensuring proper encryption and decryption procedures, and managing how information is handled, stored, transmitted, and destroyed so that sensitive material isn’t exposed as it moves or is used.

The other options don’t fit because one relates to physical facility safety, another to personnel security checks, and the last to public messaging rather than the security of the communications themselves.