RFC 5280

Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile, May 2008

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RFC 3280, RFC 4325, RFC 4630
Updated by:
RFC 6818, RFC 8398, RFC 8399, RFC 9549
D. Cooper
S. Santesson
S. Farrell
S. Boeyen
R. Housley
W. Polk
pkix (sec)

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DOI:  https://doi.org/10.17487/RFC5280

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This memo profiles the X.509 v3 certificate and X.509 v2 certificate revocation list (CRL) for use in the Internet. An overview of this approach and model is provided as an introduction. The X.509 v3 certificate format is described in detail, with additional information regarding the format and semantics of Internet name forms. Standard certificate extensions are described and two Internet-specific extensions are defined. A set of required certificate extensions is specified. The X.509 v2 CRL format is described in detail along with standard and Internet-specific extensions. An algorithm for X.509 certification path validation is described. An ASN.1 module and examples are provided in the appendices. [STANDARDS-TRACK]

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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