This document describes the Ticket Exchange Protocol (TEP). Nodes use the Ticket Exchange Protocol to create an authenticated, secure link on which access control rules are applied. As discussed in the DOF

Security Specification, TEP uses a three-party authentication system based on information stored in a security domain. The security specification covers the details of communication with the security domain.

The security domain (represented by an authentication server, or AS), uses a family of protocols called “Ticket Request Protocols,” or TRP, to communicate.