http://www.rfc-editor.org/rfc/rfc2459.txt
RFC 2459: Internet X.509 Public Key Infrastructure Certificate and CRL Profile, R. Housley, W. Ford, W. Polk, D. Solo1999-01-01T23:00:00-00:00This memo profiles the X.509 v3 certificate and X.509 v2 CRL for use in the Internet. [STANDARDS-TRACK]