Research On Security Situation Awareness Algorithm Of Markov Differential Game Blockchain Model

Nowadays,With the deepening of blockchain technology research,this technology has been widely used in many fields.However,in the process of application,the underlying code of the blockchain has many serious security issues,such as privacy leaks,smart contract vulnerabil ities,and various blockchain-oriented cyber attacks.Among the many attack methods,the Eclipse attack seriously threatened the property security of blockchain users and caused serious consequences.It fills the routing table of normal nodes and invades t he connection channels so that normal nodes cannot work normally,making them "isolated" by the blockchain network,and ultimately controlling the entire network,which has a bad impact.However,because Eclipse attacks are extremely concurrent and concealed,on the one hand,the accuracy of detecting Eclipse attacks is low.On the other hand,there are no effective defense measures to effectively resist Eclipse attacks.To this end,this paper proposes a security situation awareness model based on the Markov differential game blockchain model.The main tasks are as follows:1.Analyze the underlying structure of Bitcoin,and on this basis,design the Eclipse attack scheme and implementation to simulate the attacker's attack on the entire network.Then,a traffic detection model based on the random forest algorithm is proposed to detect Eclipse attacks,and the security data obtained by the detection is analyzed to obtain the final sample data set.Finally,the accuracy of the detection module to detect Eclipse attacks is used as an indicator to perform performance analysis.2.This article uses Eclipse attack as the only attack method to classify the security level of blockchain node servers,and uses differential game and Markov decision-making as the basic research foundation,and builds a situational awareness model based on the Markov differential game model on the blockchain.The attack graph MAG was built to transform the overall blockchain network operation process into a multi-stage continuous real-time confrontation and defense process.3.Design experiments to comprehensively evaluate the current and future security status of the blockchain network system by combining the changes in the node security level and the objective function values of the tw o parties during the game between the two parties in the game.The experimental results show that the accuracy of detecting Eclipse based on the random forest algorithm's traffic detection model and the situational awareness model based on the Markov differential game model on the blockchain are beyond expectations for assessing the current security status of the system.