Dynamical Behaviors of a new Chaotic System and its Adaptive Control

Abstract

Watchdog is a kind of behavior monitoring mechanism which is the base of many trust systems in ad hoc and wireless sensor networks. Current watchdog mechanism only evaluates its next-hop\u2019s behavior and propagates the evaluation result to other nodes by broadcasting, which is neither energy efficient nor attack resilient. An extended watchdog mechanism is proposed in this paper. Besides the next-hop, node with extended watchdog will monitor all its neighbors\u2019 behavior on the base of information collected from MAC layer. By overhearing the CTS packets, subsequent RTS or data packets and intervals between them, a node can judge whether its neighbor forwards the packet or not despite the location of the neighbor. The misbehaved node is punished by restricting its injected packets. Analysis and simulations on NS2 prove the effectiveness of extended watchdog mechanism. Its low communication overhead (about 1.76%) and attack resilience resulted from its fully distributed nature make it a competent solution in constructing a secure wireless sensor network.