When an ETA enrolls a token, which parties must be involved?

When an Enrollment Token Authority (ETA) enrolls a token, it is crucial for both the ETA and the subscriber to be involved in the process. The ETA is responsible for issuing and managing the tokens, while the subscriber is the individual or system receiving the token. Their involvement ensures that the enrollment process adheres to security protocols and requirements.

The ETA validates the subscriber's identity and credentials, ensuring that the token is issued to the correct entity. This collaborative process also includes generating and distributing the cryptographic material necessary for secure communications. The presence of both parties is integral to maintaining the integrity and reliability of the PKI, which relies on trust between the entities involved.

In this context, the incorrect options lack the crucial component of collaboration. Simply having either the ETA or the subscriber alone does not fulfill the requirements for a secure and reliable enrollment process. Therefore, the correct involvement of both parties is essential for ensuring the operational efficacy and security of token enrollment within a PKI framework.