- An Internet AttributeCertificate Profile for Authorization - This PKIX draft defines two profiles for the use of X.509 AttributeCertificates to provide authorization support for protocols like TLS, CMS and their consumers, and others.
- RFC 2459 - Internet X.509 PKI - Certificate and CRL Profile - PKIX standard that profiles the X.509 v3 certificate and X.509 v2 CRL for use on the Internet.
