Attack and defense game strategy of wireless sensor networks under multiple attacks

Only one type of attack behavior is considered in the traditional attack and defense models of wireless sensor networks (WSNs). But in fact, malicious nodes often take multiple attacks and adjust the attack strategy flexibly according to the defense of the other side in order to improve the success rate of attacks. In view of this situation, the attack and defense games in WSNs under external attack, internal attack and hybrid attack are studied respectively in this paper. Game models under three types of attacks are established based on the incomplete information game theory. Through the analysis and solution of the game models, the optimal strategies of both offense and defense are obtained. The theoretical results are verified by numerical simulations. The research results have practical guiding significance for the design of Intrusion Detection System (IDS) in WSNs.