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X.509 certificate

Definition(s):

  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.
Source(s):
NIST SP 800-57 Part 1 Rev. 5

  The X.509 public-key certificate or the X.509 attribute certificate, as defined by the ISO/ITU-T[9] X.509 standard. Most commonly (including in this document), an X.509 certificate refers to the X.509 public-key certificate.
Source(s):
NIST SP 800-57 Part 2 Rev.1