What term denotes the protective measures to deny unauthorized access to United States Government telecommunications relating to national security and to ensure authenticity?

• A. Communications Security (COMSEC)
• B. Information Security (INFOSEC)
• C. Cybersecurity
• D. Physical Security

Answer: (A)

Protecting United States Government telecommunications from unauthorized access and ensuring authenticity is the domain of Communications Security. This term covers the measures used to safeguard the content of transmissions and to verify that messages come from legitimate sources and haven’t been altered. It includes cryptographic controls, key management, and transmission security to prevent interception, tampering, or spoofing of communications. Information Security is a broader umbrella that includes protecting data in all forms, not just communications. Cybersecurity focuses on networks and information systems in general, while Physical Security guards personnel, facilities, and hardware. So, the protective measures described best fit Communications Security.