Optimal privacy and authentication on a portable communications system

Beller, Chang and Yacobi [2] have recently proposed a set of secret key and public key protocols to meet authentication and privacy requirements for conversation set-up protocols for the initiating party of portable communication systems. This paper improves upon the protocols to obtain a higher assurance of authentication and key distribution. Conversation set-up protocols for the responding party are discussed, a public key protocol providing end-to-end authentication and privacy is described, and relative as well as collective merits of the protocols are emphasised.