Which of the following is a function of Command Authorities?

The function of Command Authorities in the context of COMSEC (Communications Security) includes the management of modern key assets. This involves overseeing the generation, distribution, and safeguarding of cryptographic keys, which are essential for securing communications within military and other sensitive environments. Command Authorities ensure that these key assets are used correctly and efficiently to maintain the integrity and confidentiality of classified information.

In contrast, while the other options may be relevant to security and operational procedures within an organization, they do not specifically fall under the purview of Command Authorities. Performing annual audits pertains more to compliance and oversight activities, training personnel on encryption usage is a responsibility that may be delegated to specific training departments, and implementing communication protocols is typically the responsibility of technical teams focused on operational communication needs. Therefore, the management of key assets directly aligns with the authoritative functions that Command Authorities possess in maintaining secure operations.