Research And Application Of Multi-dimensional Information Security Risk Assessment Based On SoS System

The Internet environment in our country is in a state of continuous development,and the degree of informatization is also improving.However,a host of problems are exposed in the process of speedy development,one of which is the frequent occurrence of various risk events..There is no doubt that the protection of information security is the focus of attention under the current situation.Information security risk assessment become a hot research field at present.Therefore,according to the actual needs of information security,it is particularly important to study how to choose scientific and reasonable risk assessment methods and make effective security assessment.On the basis of some classical qualitative and quantitative methods of information security risk assessment,this paper mainly studies a method of information security risk assessment based on SoS multi-dimensional perspective combined with entropy analysis.Based on the multi-dimensional analysis of SoS system,this paper presents an improved algorithm for the application of entropy theory in traditional information security field.Based on the fuzzy comprehensive evaluation method and the analytic hierarchy process,this method is deeply studied and analyzed,and its practical application is tested.The main research contents and achievements are as follows:(1)Using the definition and characteristics of SoS,a three-dimensional evaluation hierarchy model is proposed and designed.(2)The application of traditional information entropy formula in information security risk assessment is analyzed,and the relationship between risk events and entropy value is further studied.(3)Based on the research questions,the definition of risk entropy and the improved calculation formula are proposed,and the feasibility and validity of the new formula are analyzed.(4)In order to distinguish the relative priority level of risk events,combined with the multi-dimensional thinking of SoS,the concept and parameters of comprehensive entropy weight are designed and put forward,the priority relationship is defined,and the relationship and differencebetween them are analyzed..(5)The improved multi-dimensional entropy value analysis method based on the SoS system is applied to the practical examples for analysis and verification.