摘要
将信任管理引入中间件可以解决分布环境下的代理和授权问题,但带来了性能损失.本义通过分析权限管理系统中使用的代理链搜索算法,在改进算法的基础上提出一种通过调节信任度阀门、牺牲一部分系统可用性来提升系统性能的方法;并给出反射式中间件上带有性能权衡的权限管理框架;框架在J2EE中间件PKUAS上得到实现,并通过实验证明了框架的可行性和有效性.
Introducing the concepts of trust management into middleware helps resolving the problem of permission delegation and authorization in distributed environments. But it also takes notable performance overhead. After analyzing and improve the search algorithm of delegation chains, this paper proposes a method to trading off between system security and performance, which adapts trust level valve to decrease the request latency. Based on reflective middleware,a permission management framework of trading off is presented. This paper also presents the framework implementation on PKUAS, a J2EE-compliant middleware product and the experimental validation.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第B12期2396-2400,共5页
Acta Electronica Sinica
基金
国家重点基础研究发展计划(No.2002CB312003)、国家自然科学基金(No.60125206、60233010、90412011)、国家高技术研究发展计划(No.2004AA112070、2005AA113031)
关键词
权限管理
性能
中间件
权衡
permission management
performance
middleware
tradeoff