提出了一种网络熵和随机博弈相结合的网络安全性评估方法.基于随机博弈构建了多人、多状态的网络对抗随机博弈模型.引入网络熵描述网络安全性能,通过求解模型的Nash均衡解获得最优防御策略和网络状态概率,进而利用网络状态熵差对网络安全性进行评估;最后给出了网络安全性评估算法.实例分析表明,该方法能有效评估网络安全性能,为主动防御提供决策支持. This paper proposes a network security evaluation method based on network entropy and stochastic game.The stochastic game model of multiplayer and multi-state network is constructed based on stochastic game.Network entropy is introduced to describe the network security performance. By solving the Nash equilibrium solution And obtains the optimal defense strategy and the network state probability, and then makes use of the difference of network state entropy to evaluate the network security. Finally, the network security assessment algorithm is given.Example analysis shows that this method can effectively evaluate the network security and provide the active defense policy support.