面向管理员的网络可生存性建模与计算

Modeling and calculation of administrator-oriented network survivability

从网络系统安全评价和管理的角度出发,紧密结合可生存性定义和可生存性的四个特征属性,建立了面向管理员的网络可生存性量化模型;给出了该模型的算法流程;提出了面向管理员的网络可生存性计算公式,该公式中包括恢复率和系统状态转移矩阵的计算方法,反映出可生存性对网络空闲资源和恢复时间的要求;最后进行了面向管理员的网络可生存性计算的仿真实验,表明可以利用有限的网络资源实现高水平的网络可生存性。

In terms of evaluation and management of network system security and according to the definition of network survivability and the four characters, the model of administrator-oriented network survivability is established. The arithmetic How of the model is also illustrated and then the calculating formulas of administrator-oriented network survivability are proposed, which include the calculation of restoration rate and system state transition matrix. The formulas also reflect the survivability requirements for network extra spare resources and restoration time. At last, the simulation of the administrator-oriented network survivability calculation is carried out. For administrators the model of administrator-oriented network survivability has strong maneuverability and practical significance, namely using limited network resources to realize network survivability of high level.