PKI体系下的网络安全性能评估算法

Assessing algorithm for network security performance under PKI system

通过分析基于公钥基础设施安全的网络防御问题和攻击问题,得出一个能反应网络安全性能的网络安全性能评估算法。该算法包含4个重要的安全参数:网络用户数n、密钥破解系数p、网络安全系数λ和网络安全度s。通过对网络安全性能评估算法中的各个安全参数进行分析,观察各参数对网络安全性能的影响,最后得出网络安全系数的一个上限值和网络用户数的一个上限值。这些结果可用于网络安全建设和对网络安全性能进行度量和评估。

After analyzing the defense and attack problem of network based on public key infrastructure, an algorithm representing network security performance was presented. This algorithm included four important security parameters： the number of network users（n）, the coefficient of key compromised（p）, the coefficient of network security（ λ ） and the degree of network security（s）, By analyzing theses parameters of network security performance assessing algorithm, the upper limit value of the coefficient of network security and the number of network users was concluded. These results can be used not only to the construction of network security, but also to the measurement and assessing of network security performance.