URL: http://www.ietf.org/rfc/rfc3280.txt
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 are
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, and
required extensions are defined. An algorithm for X.509 certification path
validation is described. An ASN.1 module and examples are provided in the
appendices.
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