Design And Implementation Of Evaluation System For Multiscal Information Security Vulnerability Of Warship System

As a typical Cyber Physical System,the warship system exposes to serious safety risks with the information technology widely used in it.The security vulnerability assessment of warship system is of great significance to ensure its safe and stable operation.Based on the deficiencies of existing research and the actual assessment needs of the project,this thesis deeply analyses the information security characteristics of warship systems and proposes a multi-scale information security vulnerability assessment methods for warship systems.The above methods can test warship security vulnerability from three aspects,which are warship-borne equipment,functional units and system tasks.For the warship-borne equipment evaluation,we will get the information security vulnerability metrics according to various standards to build the index model,so that we can apply the fuzzy group hierarchy analysis method to quantitatively analyze the equipment vulnerability.For the functional units,the equipment vulnerability and link vulnerability are integrated into the information flow model under the premise of gaining the network topology interaction information to get the execution vulnerability of the functional unit.For the system tasks,we aggregate the vulnerability assessment results of the functional units according to the task execution logic to get the information security vulnerability of the overall task,which is a workflow model-based evaluation method.Based on the above evaluation scheme,the warship system information security assessment software is designed and implemented,and the rationality of the proposed scheme and the feasibility of the software are verified by the simulation case.The multi-scale information security vulnerability evaluation method and its supporting evaluation software designed in this thesis have been popularized and applied in practice,which is of positive significance for promoting the construction of warship safety protection system.