Fuzzy Security Parameter Determining Method for the Commutative Cipher Based Filtering in Sensor Networks

摘要

Sensor networks are often deployed in hostile environments, thus leaving these networks vulnerable to false data injection attacks in which adversaries inject forged reports into the network through compromised nodes, with the goal of deceiving the base station or depleting the limited energy resources of forwarding nodes. The commutative cipher based en-route filtering scheme was proposed to detect and drop such forged reports during the forwarding process. In this scheme, the choice of a security parameter represents a trade-off between detection capability and overhead. In this paper, we propose a fuzzy based adaptive parameter determining method in which the security parameter is adaptively determined by a fuzzy rule based system. False traffic ratio, distance, and energy level are used to determine the security parameter. The effectiveness of the proposed method against false data injection attacks is shown by the simulation results.