Research On Network Security Assessment Methods For Intelligent Ships

With the rapid development of intelligent ships,the issue of ship network security is receiving increasing attention.To reduce the security risks of ship networks,this article evaluates the security of ship networks,identifies potential network security risks of ships,and identifies appropriate measures to reduce ship network security risks through the evaluation results.This article uses methods such as Fuzzy Analytic Hierarchy Process and Attack Graph to conduct a systematic network security assessment of intelligent ships.The specific work is as follows.(1)Based on the analysis of the characteristics of the ship’s Internet Security Systems,hackers can make use of personnel,equipment and management,thereby posing a danger to the ship’s network security.This article uses a combination of Analytic Hierarchy Process,Fuzzy Evaluation,and Weighted Average methods to calculate the likelihood of ship network systems being exploited by hackers and the risk indicators after being exploited.Based on this,the comprehensive risk degree of ship network systems is obtained,and a network security evaluation model for a single ship network system is established.According to the risk assessment matrix and standards,ships and relevant units can take corresponding measures based on the risk assessment results of the ship network system compared to the assessment table to avoid the occurrence of ship hazards caused by the security of the ship network system.(2)This article combines the attack graph model and time indicators to construct a quantitative ship network security evaluation model,considering attack time as a key factor in the ship network.Simulate the relationship between the probability of vessel network being conquered and the length of the access path,the probability of node being conquered,and the duration using Monte Carlo method.By validating the model with simulation data,it was found that the length of the access path is a key factor.The results indicate that the ship network security evaluation model based on attack graph can evaluate the impact of different indicators on the probability of ship network being attacked,and thus evaluate the security of ship network.This study can provide reference measures for maritime related departments and practitioners to improve ship network security,and has positive significance in avoiding hacker attacks,improving ship network security,and promoting the security development of the shipping industry.