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      Question

      Which of the following correctly describes 'public key

      infrastructure' (PKI)?
      A A framework for managing digital certificates and public-private key pairs to enable secure communications Correct Answer Incorrect Answer
      B A government database of all public internet IP addresses to maintain better control over network administration Correct Answer Incorrect Answer
      C A protocol for transmitting encryption keys securely over email so as to prevent unauthorized access to encryption keys Correct Answer Incorrect Answer
      D A hardware device that generates random encryption keys Correct Answer Incorrect Answer
      E A standard for managing user passwords in a centralized directory Correct Answer Incorrect Answer

      Solution

      PKI is a system of policies, procedures, hardware, software, and people for creating, managing, distributing, using, storing, and revoking digital certificates. Certificate Authorities (CAs) issue digital certificates that bind public keys to identities. PKI underpins HTTPS, digital signatures, email encryption (S/MIME), and VPNs. Banks use PKI for authenticating internet banking servers and signing digital transactions.

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