certificate authority



  • noun an independent server or company on the Internet that supplies or validates a special digital certificate to prove that another company is genuine


  • An organization which verifies the identities of entities such as individuals and corporations, so as to issue unique digital certificates which confirm their identity. A certificate authority can serve as a trusted third party in transactions where security and electronic commerce are involved. Its abbreviation is CA. Also called certification authority.
  • synonymcertification authority