History of the X.500 standard
1984 start of efforts for defining a standard for distributed data in the net
1988 first version of the X.500 standard
- X.509 includes authentication based on asymmetric encryption
- Undefined access control and replication
- proprietary replication mechanism in first implementation Quipu from the ISODE Consortium
1993 second version
- includes the missing bits
1997 third version
- includes enhanced definitions for authentication (X.509v3)