Authentication, confidentiality, and integrity extensions to the XNS protocol suite
Russ Housley · ACM SIGSAC Review · 1989
The Xerox Network Systems (XNS) architecture[1] includes all of the security features found in today's most popular protocol suites. In addition, XNS provides strong authentication at the beginning of each conversation. Authentication is the verification that both entities in a conversation are the ones claimed.[2] The Authentication Protocol[3] provides authentication in such a way that no passwords are ever transmitted on the network.