The available options are:
A Setting new key expiry dates
B Notification to all employees of revoked keys
C Removal of the private key from all directories
D Updating the certificate revocation list
Answer:
D. Updating the certificate revocation list
Step-by-step explanation:
When a certificate is revoked, the proper procedure that needs to be followed is the addition of the CA's certificate to the revocation list.
This Certificate Revocation List is then expected to be known or be notify to all users and applications. This implies that certificate revocation list is expected to be checked before recipients approve a certificate and other related things.
Hence, in this situation, the correct answer is option D which is Updating the certificate revocation list