X.509 Certificate

nounid 4699·updated May 9, 2026

candidate

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The X.509 public-key certificate or the X.509 attribute certificate, as defined by the ISO/ITU-T X.509 standard. Most commonly (including in this document), an X.509 certificate refers to the X.509 public-key certificate.

MWE

Classifications

per-axis with provenance

Entity Type

Credential90%rule-basedr:entity.credential.cert.v1

Sensitivity

unclassified

Information Class

unclassified

Variants

3 surface forms

plural: X.509 Certificates
possessive: X.509 Certificate's
pluralpossessive: X.509 Certificates'

Framework definitions

2 senses across 2 frameworks

NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →

§1: The X.509 public-key certificate or the X.509 attribute certificate, as defined by the ISO/ITU-T X.509 standard. Most commonly (including in this document), an X.509 certificate refers to the X.509 public-key certificate.

NIST SP 800-57 Part 11 senseview framework →

§1: The X.509 public-key certificate or the X.509 attribute certificate, as defined by the ISO/ITU-T X.509 standard. Most commonly (including in this document), an X.509 certificate refers to the X.509 public-key certificate.

Outgoing relationships

term as subject — 0 triples

No outgoing triples

This term is not the subject of any RDF-style relationship yet.

Incoming relationships

term as object — 0 triples

No incoming triples

No other term currently asserts a relationship to this one.