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文章针对网络安全保密系统的安全需求和运行特性,引入Petri网理论指导网络安全保密系统的可靠性建模与分析过程。首先详细描述了运用随机Petri网对网络安全保密系统进行可靠性建模与分析的具体方法和过程;然后给出一个实例,对系统的保密性服务子系统进行建模,并分析了该子系统在安全运行状态下的可靠性。通过对可靠性建模分析方法的应用,不仅实现了系统方案设计阶段可靠性的可评估性,而且提高了系统后期开发过程的可操作性。
In this paper, according to the security requirements and operational characteristics of cybersecurity and security system, Petri net theory is introduced to guide the reliability modeling and analysis process of cybersecurity and security system. First of all, the paper describes in detail the specific method and process of using the stochastic Petri nets to model and analyze the reliability of network security system. Then, an example is given to model the system’s security service subsystem, and the subsystem Reliability in safe operation. Through the application of the reliability modeling and analysis method, not only the assessability of the reliability of the system design stage but also the operability of the system post-development process are improved.