Efficient and Mutually Authenticated Key Exchange for Low Power Computing Devices

Abstract

In this paper, we consider the problem of mutually authenticated key exchanges between a low-power client and a powerful server. We show how the Jakobsson-Pointcheval scheme proposed recently [15] can be compromised using a variant of interleaving attacks. We also propose a new scheme for achieving mutually authenticated key exchanges. The protocol is proven correct within a variant of Bellare-Rogaway model [3,4]. This protocol gives the same scalability as other public-key based authenticated key exchange protocols but with much higher efficiency and fewer messages. It only takes 20 msec total computation time on a PalmPilot and has only three short messages exchanged during the protocol.

DOI: 10.1007/3-540-45682-1_17

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