基于多服务提供者模型的分布式CA系统研究

Study on distributed certificate authority system based on multi-provider model

为了提高公钥基础设施(PKI)中认证中心(CA)系统的服务能力,使其具备较高的可用性,提出一个基于多服务提供者模型的分布式CA系统,以提高CA系统的抗毁顽存和容错能力。并基于服务质量(QoS)属性采用自动修正判断矩阵的层次分析法对候选服务集合中的服务进行QoS评估,以达到快速选择最优服务的目的。实验结果表明该方法有效提高了服务请求的执行效率,满足了用户的QoS需求。

To improve the service ability and availability of Certificate Authority （CA） system in the Public Key Infrastructure （PKI）,a distributed CA system based on the model of multi-provider was proposed,which can improve the CA＇s ability of survivability and fault-tolerant.On the basis of Quality of Service （QoS）,an Analytical Hierarchy Process （AHP） approach with automatically modifying judgement matrix was proposed to estimate the quality of service,so that the best service could be selected quickly.The experimental results show that this strategy increases running efficiency of service request and meets the needs of user＇s QoS requirement.