可信计算及其关键技术研究

The Study on Dependable Computing and its Key Technology

1.计算机系统的可信性 随着世界经济全球化的加剧,计算机系统应用呈现出日益广泛而深入的发展态势,政治、经济、商业运作和各类事务处理越来越严重地依赖于计算机数据服务,在国防军事、核反应堆控制、飞机航行控制、火控及化学反应控制等关键应用和医疗、金融、交通、通讯、气象、电力、石油化工、Web服务、联机事务处理OLTP、科学计算等重要应用中尤其如此.

The dependability is the latest and highest techno-target used to evaluate the performance quality of a distributed computing system in open network environment, it includes traditional reliability, availability, robustness, survivability, security, data integrity and software protecting ability, etc. A dependable system should not only be provided with fault tolerance ability, but also withstand from risk and recover from disaster, its realization foundation is the high availability of the information transmission network and survivability, fault tolerance and security safeguard of the system. This paper presents a survey of the survivability mechanisms such as long-distance backup, cluster and system recovery, while discussing the techniques of fault tolerance design and information network system security safeguard, and analyzing the information redundant dispersal strategy and model for survivability and security safeguard.