基于博弈论的信息系统生存性提升方法研究

Approach on Promoting Survivability for Information System Based on Game-theory

当前对信息系统生存性的研究主要集中在静态环境下生存性定量分析及保障的技术实现,但生存性在不同技术和动态环境下的能力是不一样的,根据生存性能力高低可以将其划分成若干等级。用户在向信息系统提交业务时需要根据生存性等级来支付费用,而经营者为达到相应的生存性等级必须付诸一定的投资,因此,经营者迫切希望能够找到一种提升方法,以自身的收益来决定信息系统应该具备的生存性等级。通过对信息系统经营者和用户之间的博弈行为及收益分析,构建了博弈模型,并对混合策略下的纳什均衡进行了求解,并根据收益最大化原则设计了经营者是否提升信息系统生存性等级的控制策略。最后在一个生存性被划分为5个等级的信息系统上进行了仿真实验,计算结果表明所提出的博弈模型及生存性提升方法是合理、可行的。

The current study of survivability of information system is focused on the technique realization of quantitatively analysis and guarantee of survivability in static environments.The survivability is different with various techniques in dynamic work conditions,which can be classified into multiple grades according to corresponding capability.Custom needs to pay different service fee at different survivability grade in an information system.At the same time provider must invest considerable money so as to keep a particular survivability grade.An approach has to be proposed urgently,with which the provider can decide whether to promote the survivability grade by his income.A game-theory based model was constructed in this paper by analyzing the action and income of customer and provider who act as the two players.The mixed strategy Nash equilibrium were derived from the model and the strategy for promoting survivability grade was devised,with which the income of provider can be maximized.An experiment was carried out in an information system simulated by 5 survivability grades and the results show that the game-theory based approach presented in the paper is correct and reasonable.