可生存性分析方法研究

Research of Survivability's Analysis Method

系统在受到入侵后依然能够提供必要服务,并在一定时间内恢复受侵害的服务是系统可生存性的本质要求。与传统的将可生存性作为非功能系统属性来描述的方法不同,将可生存性作为系统统一系统功能来研究,并用形式化语言来描述、定义和计算是一种全新的思路和方法。对可生存性分析阶段可以采用的方法进行了深入的研究、分析,其中重点阐述了工作流回溯、攻击树建立等可生存性需求分析的方法,并给出了可生存性量化分析的算法。

Survivability is the ability of a system to fulfill its mission,in a timely manner,in the presence of attacks,failures,or accidents. Survivability is regarded as a system function and being depicted,defined and calculated in formalized languages,different from traditional research of describing survivability as a nonfunctional system property.In this article the methods to analysis survivability is revealed and analysed,emphasising the survivability requirements analysis method such as workflow feedback and attack tree. And a survivability quantification analysis algorithm is given.