Which of the following is used to validate and in some cases revoke certificates?

Which of the following is used to validate and in some cases revoke certificates?

  • PKI
  • DHCP
  • PGP
  • POP
Explanation:
A public key infrastructure (PKI) contains software hardware and policies that allow digital certificates to be created, validated, or revoked. A digital signature provides integrity, authentication, and non-repudiation in electronic mail. A PKI typically consists of the following components: certificates, a key repository, a method for revoking certificates, and a method to evaluate a certificate chain, which security professionals can use to follow the possession of keys.

Pretty Good Privacy (PGP) is an email encryption system. PGP uses a web of trust to validate public key pairs. In a web of trust model, users sign their own key pairs. If a user wants to receive a file encrypted with PGP, the user must first supply the public key.

Post Office Protocol (POP) is a client email program. It is used to retrieve email from the email server.

Dynamic Host Configuration (DHCP) is a protocol that allows network administrators to centrally manage and automate the assignment of Internet Protocol (IP) addresses in an organization’s network. DHCP can automatically assign a new IP address when a computer is plugged into a different location on the network.

Objective: Cryptography
Sub-Objective: Describe the operation of a PKI

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