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• The International Organization for Standardization/International Telecommunication Union Standardization Department (ISO/ITU-T) X.509 standard defined two types of certificates the X.509 public key certificate, and the X.509 attribute certificate. Most commonly (including this document), an X.509 certificate refers to the X.509 public key certificate.

  NIST - Cite This Source - This Definition
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  Cite Definition for X.509 Certificate

  American Psychological Association (APA)

  X.509 Certificate. (n.d.). Glossary of Key Information Security Terms. Retrieved February 1, 2023, from website: http://www.expertglossary.com/definition/x-509-certificate.

  Chicago Manual of Style (CMS)

  X.509 Certificate. csrc.nist.gov. Glossary of Key Information Security Terms. NIST. http://www.expertglossary.com/definition/x-509-certificate (accessed: February 1, 2023).

  Modern Language Association (MLA)

  "X.509 Certificate." Glossary of Key Information Security Terms. NIST. 1 February. 2023 http://www.expertglossary.com/definition/x-509-certificate.

• Browse Related Terms: CA (Certification Authority), certification, Certification Practice Statement (CPS), CRL (Certificate Revocation List), Duration, On-Line Certificate Status Protocol (OCSP), Online Certification Status Protocol (OCSP), public key infrastructure (PKI), Re-key (a certificate), Renew (a certificate), Update (a Certificate), X.509 Certificate, X.509 Public Key Certificate

All > Technology > Security

• The public key for a user (or device) and a name for the user (or device), together with some other information, rendered unforgeable by the digital signature of the certification authority that issued the certificate, encoded in the format defined in the ISO/ITU-T X.509 standard.

  NIST - Cite This Source - This Definition
  ×

  Cite Definition for X.509 Public Key Certificate

  American Psychological Association (APA)

  X.509 Public Key Certificate. (n.d.). Glossary of Key Information Security Terms. Retrieved February 1, 2023, from website: http://www.expertglossary.com/definition/x-509-public-key-certificate.

  Chicago Manual of Style (CMS)

  X.509 Public Key Certificate. csrc.nist.gov. Glossary of Key Information Security Terms. NIST. http://www.expertglossary.com/definition/x-509-public-key-certificate (accessed: February 1, 2023).

  Modern Language Association (MLA)

  "X.509 Public Key Certificate." Glossary of Key Information Security Terms. NIST. 1 February. 2023 http://www.expertglossary.com/definition/x-509-public-key-certificate.

• Browse Related Terms: CA (Certification Authority), certification, Certification Practice Statement (CPS), CRL (Certificate Revocation List), Duration, On-Line Certificate Status Protocol (OCSP), Online Certification Status Protocol (OCSP), public key infrastructure (PKI), Re-key (a certificate), Renew (a certificate), Update (a Certificate), X.509 Certificate, X.509 Public Key Certificate