Which of the following statements about the responsibilities of the Trusted Agent is true?

The statement that Trusted Agents must verify subscribers’ identities is true because this is a core responsibility of the role. Trusted Agents act as intermediaries who help authenticate the identities of individuals or entities seeking to obtain digital certificates. In the context of the US Army PKI, validating the identity of subscribers ensures that only authorized personnel can access and use the public key infrastructure. This process often involves collecting identification documents, confirming credentials, and ensuring that the individuals meet the necessary criteria for receiving a certificate, which is essential for maintaining the integrity and security of the PKI environment.

The other responsibilities listed do not align with the primary duties of a Trusted Agent. Software development is typically not part of the Trusted Agent's role; instead, it pertains to IT staff or development teams. Managing physical security of facilities is usually handled by security personnel rather than Trusted Agents, who focus more on identity verification. Lastly, while compliance with foreign regulations is important for organizations, it falls under the purview of legal or compliance officers rather than the Trusted Agent's responsibilities. Thus, verifying subscribers’ identities is a fundamental task that highlights the critical security function Trusted Agents serve within the PKI framework.