The help desk received a call from a user noting the digital certificate on the organization-issued security identification card was invalid. Which is the BEST reason the certificate stopped working?
A.
The user's certificate was compromised by the public key of the user.
B.
The public key of the Certificate Authority (CA) is known to attackers.
C.
The user's certificate was absent from the Certificate Revocation List (CRL).
D.
The user's certificate has expired and needs to be renewed.
Chosen Answer:
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