A Distributed Group Rekeying Scheme for Wireless Sensor Networks

摘要

In applications that require group communication and clustering, there is usually a single key for all members of the group. This key should be updated in order to support dynamic nature of the groups and also to handle possible node compromise attack. In this paper, we propose a new distributed group rekeying scheme with t-revocation capability that is based on local collaboration of group members. Our proposed scheme provides t-wise backward and forward secrecy. It can be used with any key size. This scheme, in contrast to centralized schemes, does not require a centralized rekeying server, so the rekeying process is handled locally in the group itself and the communication overhead is reduced. The security of this scheme is analyzed. We have also implemented our proposal for TinyOS and have used Avrora to simulate the compiled binary for MICA2 motes. Simulation results show that compared to the only published distributed scheme, our scheme consumes less energy and has lower communication overhead.