Short Paper: A new Identity-based DH Key-agreement Protocol for Wireless Sensor Networks Based on the Arazi-Qi Scheme

摘要

Public key cryptography based on elliptic curves is a promising foundation for energy-scarving pairwise key establishment in wireless sensor networks. Focusing on the Diffie-Hellman key-agreement, identity-based schemes can be applied to provide mechanisms for authentication. The AQ-protocol presented by Arazi et al. introduces such a key establishment supporting fixed as well as ephemeral keys. In this paper we review two known attacks of the ephemeral key establishment of this protocol. We introduce a new ephemeral key establishment for the AQ-protocol to fix these problems and analyze the proposed approach from a security perspective. We illustrate its feasibility for wireless sensor networks by presenting implementation results for the MI-CAz platform using TinyOS 2.x.