ANSI X9.26 : 1990

1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Common abbreviations
4 Requirement and limitations
4.1 Requirements
4.2 Limitations
5 Sign-on authentication
5.1 Basic functions
5.2 Authentication process
5.3 Authentication of a user via PAI (type 1
     authentication)
5.4 Authentication of a user via a user-unique key
     (type 2 authentication)
5.5 Authentication of a node via a node-unique key
     (type 3 authentication)
5.6 Bi-directional authentication
6 Protocol specification for interoperability
     (optional)
6.1 Requirements
6.2 Notations
6.3 Transmission of TVP
6.4 Authentication of a user via PAI
6.5 Authentication of a user via a user unique key
6.6 Authentication of a node via a node unique key
6.7 Error recovery
Appendix
A Implementation concerns

Covers three types of sign-on authentication between entities requesting access and entities capable of granting access.