Which of the following is NOT a function of COMSEC?

The correct choice indicates that providing training for personnel is not a function of Communication Security (COMSEC). COMSEC primarily focuses on measures designed to protect classified or sensitive information during communication. This includes protecting sensitive information through encryption, ensuring the integrity of data transmission by preventing interception or unauthorized access, and facilitating encrypted communication channels to safeguard data exchanges.

While training is important for personnel to effectively understand and implement COMSEC procedures, it is not a direct function of COMSEC itself. Instead, training is typically considered a necessary supportive activity that helps personnel comply with COMSEC practices, rather than a core function of the COMSEC system. Hence, this option distinguishes itself by relating to the educational aspect rather than the operational functions surrounding the security of communication.