Research On Quantitative Calculation And Tolerance Mechanism Of Data Intrusion Tolerance Of Energy Internet Under Network Attack

The emergence of energy Internet promotes the coupling of power,solar energy,natural gas,and other energy networks has changed the traditional model of energy utilization.The energy Internet has the characteristics of complex structure,wide data sources,large data scale,and open data sharing,which brings great challenges to the security and protection of energy Internet data.The existing data security protection methods focus on encryption and decryption,security audit,blockchain,and other aspects.But the concealment of network attacks is becoming stronger and stronger.It is impossible to completely prevent malicious attacks against data through the existing security protection schemes,which brings new challenges to the data security protection of the energy Internet.This paper studies three aspects: analysis of energy Internet data security risk,calculation of energy Internet data intrusion tolerance quantitative,and mechanism of energy Internet data intrusion tolerance based on game theory.(1)The existing security risk analysis of energy Internet mainly includes the attack tree model,infectious disease model,and other methods,but most of them do not consider node risk.Therefore,this thesis proposes a Network Node Risk Assessment Model based on the Cloud Model to assess the risk of network nodes.According to the risk of cascade failure caused by the destruction of physical lines and considering the coupling relationship between the information network and physical network,the risk value of cascading failure is calculated.The effectiveness and accuracy of the proposed model are verified by experiments.(2)Most of the current researches on the quantification of data intrusion tolerance do not use the method of quantitative analysis.Therefore,based on the quantitative principle of data survival of data autonomy and set theory,this thesis proposes a Quantitative Model of Data Intrusion Tolerance of Energy Internet,which is mainly used to analyze the survival of cyber physical systems in all links of energy Internet when the data is attacked,to build the basic data security component chain corresponding to the data autonomous domain and the attack scenario,and to analyze the evolution of data survivability from three aspects: data attack resistance,identifiability,and data recoverability.(3)The existing research and analysis of intrusion tolerance are limited to qualitative analysis at the macro level,and there is no research on the quantitative calculation of intrusion tolerance and intrusion tolerance mechanism for data services in energy Internet or power information physical fusion system.To better deal with the impact of network attacks on energy Internet data security,this paper proposes a Data Intrusion Tolerance Model Based on Game Theory,which finally realizes the Nash equilibrium between intrusion tolerance system and intruder by constructing the corresponding tolerance cost and intrusion cost.Experiments verify that the DITM-GT model can well realize the Nash equilibrium between data protection system and intrusion system,and provide theoretical support for the later data protection system to choose the defense strategy for the intrusion system.