IETF-PKIX Public-Key Infrastructure X.509 Working Group Charter  
   Charter of the working group that develops Internet standards needed to support an X.509-based PKI. (pkix)
   http://www.ietf.org/html.charters/pkix-charter.html

Internet X.509 PKI - PKIX Roadmap  
   This document provides an overview or 'roadmap' of the work done by the IETF PKIX working group. It describes some of the terminology used in the working group's documents, and the theory behind an X.509-based PKI.
   http://www.ietf.org/internet-drafts/draft-ietf-pkix-roadmap-10.txt

RFC 2527 - Internet X.509 PKI - Certificate Policy and Certification Practices Framework  
   The document presents a framework to assist the writers of certificate policies or certification practice statements forcertification authorities and public key infrastructures.
   http://www.ietf.org/rfc/rfc2527.txt

RFC 2528 - Representation of Key Exchange Algorithm (KEA) Keys in Internet X.509 PKI Certificates  
   The PKIX specification profiles the format and semantics of fields in X.509 V3 certificates containing Key Exchange Algorithm (KEA) keys, a classified algorithm for exchanging keys.
   http://www.ietf.org/rfc/rfc2528.txt