Research on Network Security Evaluation and Optimal Active Defense based on Attack and Defense Game Model in Big Data Era

Due to the increasing progress of socialist modernization and the increasing progress of social productivity, the national computer industry has developed rapidly in recent years, and has become the main driving force to promote China's economic development. Facing the increasingly complex network environment, the traditional network security technology can not effectively resist the existing network attacks. Low defense and high memory consumption are two disadvantages of traditional network information security assessment. In essence, network security is the process of mutual game between network attackers and network defenders. In the process of mutual game, if one party benefits, it is the winner. In order to carry out the security evaluation and active defense of network information system, the network defense graph model, the classification of attack and defense strategies and their cost quantification method, the network attack and defense game model and the optimal active defense selection algorithm based on the above model are proposed. Based on the attack and defense game theory, this paper analyzes the network security evaluation and optimal active defense methods by establishing a model