QuestionQ21

Security Principles

Digital signatures are commonly provided by a _______, in which a third party verifies the authenticity of a key.

  • A Network firewall
  • B Security administrator
  • C Domain controller
  • D Certificate Authority
  • E Hash function
Explanation

A certificate authority (CA) acts as a trusted third party that validates identity and issues a certificate binding that identity to a public key, enabling others to trust the key’s authenticity.

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