基于随机博弈与网络熵的网络安全性评估

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.

Network Security Evaluation Based on Stochastic Game and Network Entropy

A security evaluation based on network entropy and stochastic game was presented. An attack defense stochastic game model was proposed to describe the conflict of network security which is dynamic and multi-state. The concept of network entropy was introduced to describe network security performance. The optimal defense strategy and network state probability was obtained by solving the Nash equilibrium of attack defense stochastic game model. On this basis, the security of network was assessed combining with network states entropy difference. Network security evaluation algorithm was given at last. An example is representatively provided to show that the method can effectively assess the security of network and predict intrusion behavior.