ITU Recommendation X.509
Official web pages containing the standards published by the International Telecommunication Union.
Handbook of Applied Cryptography
Introduction to the practical aspects of conventional and public-key cryptography. (PDF and Postscript sample chapters)
RFC 4158: Internet X.509 Public Key Infrastructure: Certification Path Building
Provides guidance and recommendations to developers building X.509 public-key certification paths within their applications.
Encyclopedia article about the ITU-T standard for a public key infrastructure. Includes history, certificate details, and references.
X.509 Style Guide
Document by Peter Gutmann intended as a set of implementation notes and guidelines for developers.
Last update:September 3, 2015 at 9:05:12 UTC