Which PKI operation would likely cause out-of-band communication over the phone?
- The client checks with the CA to determine whether a certificate has been revoked.
- The client validates with the CA to determine if the peer that they are communicating with is the entity that is identified in a certificate.
- A new signed certificate is received by the certificate applicant from the CA.
- The CA administrator contacts the certificate applicant to verify enrollment data before the request can be approved.
| Explanation & Hint:
The PKI operation that would likely cause out-of-band communication over the phone is:
This step often involves direct communication to ensure the identity of the certificate applicant and the accuracy of the enrollment data, which is a critical part of the vetting process in PKI (Public Key Infrastructure) to maintain trust within the system. This verification step is typically conducted using a method that is separate from the electronic certificate application process, hence “out-of-band,” to provide an additional layer of security. |