入侵容忍系统模型构建及量化分析

为提高网络中系统在恶意入侵情况下能继续提供服务的能力，研究了第三代信息安全技术中的入侵容忍技术，并提出了改进的入侵容忍系统模型. 该模型可对入侵容忍能力进行量化分析. 提出了容忍度、完整度、保密度的概念，分析了这些变量与相关因素，并对模型进行了量化求解和仿真. 研究结果表明，所提出的模型对于构建入侵容忍系统有一定的指导意义.

An Intrusion Tolerance Model and Quantizing Analysis

To improve the service ability under hostile intrusion, intrusion tolerance technology was studied and an improved intrusion tolerance model was built. Intrusion tolerance ability was mainly quantified and discussed by the model. Conceptions of intrusion tolerance degree, integrity degree and security degree were proposed. Some correlated factors which can influence intrusion tolerance degree were analyzed. And quantizing simulation and solution were carried out. The conclusion showed that it was meaning to design intrusion tolerance system.