Which of the following is NOT a defence against enemy deception?

Which of the following is NOT a defence against enemy deception?

• A. Authentication
• B. Good procedures
• C. Constant vigilance
• D. Encryption

Answer: (D)

Defending against deception hinges on verifying who is speaking and ensuring the message is credible, not just keeping the content secret. Authentication confirms the transmitter’s identity, so you can trust the source. Good procedures enforce proper call-sign discipline and verification steps, making spoofing harder. Constant vigilance means staying alert for inconsistencies, unusual call signs, or unexpected prompts, so deception is caught early. Encryption, on the other hand, protects the content from eavesdroppers but does not by itself verify who sent the message or guarantee its integrity. An adversary could impersonate a legitimate operator or inject false information, and encryption alone wouldn’t reveal that deception. So encryption is not a defense against enemy deception.

Defending against deception hinges on verifying who is speaking and ensuring the message is credible, not just keeping the content secret. Authentication confirms the transmitter’s identity, so you can trust the source. Good procedures enforce proper call-sign discipline and verification steps, making spoofing harder. Constant vigilance means staying alert for inconsistencies, unusual call signs, or unexpected prompts, so deception is caught early. Encryption, on the other hand, protects the content from eavesdroppers but does not by itself verify who sent the message or guarantee its integrity. An adversary could impersonate a legitimate operator or inject false information, and encryption alone wouldn’t reveal that deception. So encryption is not a defense against enemy deception.