X.500 Standard status
X.509 Related activities
How to be involved
Tutorial section 1
Tutorial section 2
Other PKI organizations
PKIX) developed a large number of Internet specifications to support X.509-based Public Key Infrastructures. PKIX has terminated its activity, but maintains an e-mail exploder.
While the CA/Browser Forum and ETSI ESI are primarily profiling the ITU-T X.509 for special purposes, the PKIX was in addition a standard making body having produced a large number of PKIX specifications.
PKIX has developed an important specification called Online Certificate Status Protocol (OCSP).
PKIX has also developed some X.509 Extensions beyond those defined by X.509 itself.