What is used in radio systems to ensure that surveillance, special enforcement activities, or tactical operations are not compromised?

• A. Encryption
• B. Authentication
• C. Routing
• D. Paging

Answer: (A)

Protecting the content of radio communications from interception is the essential idea. Encryption scrambles messages using a cryptographic key so only devices with the correct key can decode them. This keeps surveillance, special enforcement activities, and tactical operations from being understood by unauthorized listeners. Authentication focuses on verifying who is communicating to prevent impersonation, but it doesn’t by itself hide the message content. Routing and paging determine where and how messages go or are alerted, not the secrecy of the payload. So encryption is the mechanism that prevents the communications from being compromised.