信息系统的可存活性  

Survivability of Information Systems

作　　者：胡方炜[1] 李千目[1] 许满武[1] 

机构地区：[1]南京大学软件新技术国家重点实验室,南京210093

出　　处：《计算机科学》2008年第10期269-271,共3页Computer Science

基　　金：中国博士后科学基金;江苏省自然科学基金

摘　　要：可存活性是用来表明系统在面对蓄意攻击、故障失效或偶发事故时仍能完成其任务的能力。可存活性要求系统具有四个关键性质:抵抗性、识别性、恢复性、适应和演化性质。目前对于可存活性的研究可以分为分析和实现两个方面。可存活性的分析一般通过建模的方法,对原有系统的可存活性进行度量,找到系统的薄弱环节。可存活性的实现一般通过体系结构的设计改进或者重新配置的方法,来提高系统的可存活能力。无论是分析还是实现的研究,方法多样,但是却有着很大的局限性。Survivability is the capability of a system to fulfill its mission, in a timely manner, in the presence of attacks, failures,or accidents. Survivability requires the system to have four key properties：resistance,recognition,recovery,adaptation and evolution. At present, the study on the survivability can be divided into two aspects, analysis and realization. Survivability analysis generally measures the system＇s survivability through modeling, and then finds out the weak parts of the system. Survivability realization is to improve the system＇s survivability through the design, improvement of the system or reconfiguration. There are lots of methods in both the analysis and realization research,but they have some limits.

关 键 词：可存活性 可存活性的分析 可存活性的实现 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TS201.3[自动化与计算机技术—计算机科学与技术]