Effectiveness Analysis And Simulation Research Of Security System Based On Intrusion Path Analysis

In recent years,international terrorism has become increasingly rampant,which has brought serious threats to the safety of people ’s lives and property and the stable development of society.Security & protection system is an important protection system for critical infrastructure to resist foreign invasion and protect core assets from threats such as intentional destruction,theft and illegal transfer.Therefore,it is particularly important to establish a targeted security & protection system effectiveness evaluation system,find the weak links of the system and improve and upgrade it.Critical infrastructure is generally a high-risk closed area,and intrusions against it usually plan the invasion path in advance and have clear targets.From the perspective of intrusion path analysis,this paper studies the effectiveness evaluation method of security & protection system in high-risk closed areas.The research contents include :Through field research,taking the actual scene as the prototype,combined with the relevant security standards,the typical security scene in high-risk closed environment is abstracted as the research object of this paper.Through expert consultation and repeated screening,the security & protection system vulnerability assessment index system of typical security scenarios in high-risk closed environment based on intrusion path is constructed,and three secondary indicators of detection,delay and response and corresponding 12 tertiary indicators are determined.The analytic hierarchy process is used to calculate the weight of each index,and the fuzzy comprehensive evaluation method is used to analyze the vulnerability of the security & protection system.Based on the intrusion sequence diagram(ASD)and EASI(Estimation of adversary sequence interruption)model,the interception probability of each path is calculated quantitatively to find the vulnerable path.At the same time,the sensitivity of parameters is further analyzed,and the relationship curve between interception probability and detection probability,delay time,response time,communication level and other factors is obtained,so as to find the key to improve the effectiveness of security & protection system.In order to further study the role of the security & protection system in the process of resisting foreign invasion,Anylogic simulation software is used for simulation modeling analysis,and a simulation model of three different armed levels of intruders invading along multiple paths is constructed.The model incorporates factors such as armed level,patrol personnel detection,detection along the way,patrol capture,and response tactical changes.Multiple simulations and statistical analysis of information such as interception probability,alarm node,interception location,and interception type were carried out.It is found that the security & protection system has problems in preventing external intrusions and proposes optimization schemes such as combined detection,patrol path optimization,core asset location adjustment,and reasonable arrangement of police stationing positions from three aspects of detection,delay,and response.It has certain reference value for improving the effectiveness of security & protection systems in high-risk areas.