An Impersonating-Resilient Key Agreement Scheme for Wireless Sensor Networks

In this paper, we proposed an authenticated key agreement scheme, TinyIBAK, based on the identity-based cryptography, for wireless sensor networks. The TinyIBAK scheme provides implicit identity authentication and key confirmation, which effectively prevents unauthenticated access to the sensor network and resists impersonation attacks. We implemented our proposal for TinyOS-2.1 based on the MICAz motes, analyzed the memory occupation, and evaluated the time and energy performance with the Avrora toolkit. Experimental results indicate that our proposal consumes an acceptable amount of resources, and is feasible for infrequent key distribution and rekeying in wireless sensor networks.