In case of a locked PIN, what does the ETA need to proceed with the reset?

The correct answer is that the subscriber's information, including their Certificate and Key Separation Attributes (CC/S/A), is necessary for the reset process in the case of a locked PIN. This information is crucial because it allows the Emergency Trusted Agent (ETA) to verify the identity of the subscriber and ensure that the request for a PIN reset is legitimate.

The Certificate and Key Separation Attributes serve as a reference point for the ETA, providing essential data to authenticate the subscriber effectively. This ensures that the process aligns with security protocols and helps prevent unauthorized access or fraud. Having detailed subscriber information allows the ETA to exercise due diligence in confirming that they are resetting the PIN for the correct person based on the PKI system's established security measures.

In scenarios where only identification or a password might be considered, these options would lack the comprehensive verification that CC/S/A provides, potentially undermining the robustness of the security procedures in place. Therefore, requiring the full set of subscriber information for a PIN reset aligns with best practices for maintaining the integrity of the PKI environment.