Technical Report TR-98-5B, LCIS, Tamkang University, Taiwan, R.O.C., May 1998.
Published in Electronics Letters, 24(18), pp. 1738-1739, September 1998.

Abstract. Recently, Harn and Lin (1998) developed a two-phase authenticated key agreement protocol which enables two parties to share multiple shared keys. The first phase of their protocol is the most important part and can be used to deliver a sequence of temporary random public keys to the other party in an authenticated approach. In this report, we demonstrate an improved version of this novel scheme after giving some cryptanalytic details of the original Harn-Lin scheme.