基于博弈论的无线传感网络节点攻防优化

Attack and defense optimization of wireless sensor network nodes based on game theory

针对无线传感器网络各节点在安全需求与资源消耗上存在的矛盾,提出一种基于博弈论的无线传感网络节点优化博弈模型。首先,通过分析网络节点中攻击方的攻击代价与防守方的防守开销,基于博弈论分析攻防双方的效用函数并构造攻防博弈模型;其次,根据网络节点中攻防双方选择的不同行动策略,结合信息论技术将攻防双方抽象成随机变量,并设计博弈信道模型;接着,由信道容量与纳什均衡融合定理分析攻击方的攻击代价与防守方的防守开销,当博弈双方的效用达到纳什均衡时与信道容量相等,此时双方采用的行动策略即为博弈的纳什均衡解;最后,对设计的模型进行实验与仿真,结果表明,该模型在保证无线传感网络安全性的前提下,有效地降低了网络系统的防守开销,延长了网络系统的生命周期。

Aiming at the contradiction between security requirements and resource consumption of wireless network nodes,a wireless sensor network node optimization game model is proposed based on game theory.Firstly,by analyzing the attack cost of the attacker and the defense cost of the defender in the network node,the utility function of the offense and defense is analyzed based on game theory,and the offense and defense game model is constructed.Secondly,according to the different action strategies selected by the offensive and defensive parties in the network node,combined with information theory technology,the offensive and defensive parties are abstracted into random variables,and the game channel model is designed.Then,the attack cost of the attacker and the defense cost of the defender are analyzed according to the channel capacity and Nash equilibrium fusion theorem.When the utility of both parties in the game reaches the Nash equilibrium,it is equal to the channel capacity.At this time,the action strategy adopted by both parties is the Nash equilibrium solution of the game.Finally,through experiments and simulations on the designed model,the results show that the model effectively reduces the defense overhead of the network system and prolongs the life cycle of the network system while ensuring the security of the wireless transmission network.