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Which of the following actions in PKI takes a certifica…

Which of the following actions in PKI takes a certificate authority?

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A.
Signs and verifies all infrastructure messages

B.
Issues and signs all private keys

C.
Publishes key escrow lists to CRLs

D.
Issues and signs all root certificates

Explanation:
A certificate authority can issue multiple certificates in the form of a tree structure. A root certificate is part of a
public key infrastructure (PKI) scheme. The most common commercial variety is based on the ITU-T X.509
standard, which normally includes a digital signature from a certificate authority (CA).
Note: In cryptography and computer security, a root certificate is an unsigned public key certificate (also called
self-signed certificate) that identifies the Root Certificate Authority (CA).

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