摘要
分布式环境下需要可传递授权机制,而传统委托授权模型的委托授权不但缺乏对时间和空间的约束,而且仅是基于主体间的信任关系人为的确定可委托授权的主体,是不精确且模糊的。针对上述问题,文章提出了基于图的具有时空约束的可信赖委托授权模型,不仅利用模糊理论来确定可信赖的委托主体,而且增加了时间和空间的约束,分析并解决了循环授权和授权撤销问题。该模型满足了应用中的时空约束、可信赖传递授权等安全需求,具有普遍适用性。
Transferable authorizations are required in a distributed environment. Traditional delegable authorization model is not only lack of time and space constraints, but also determines the delegated subject with human brain based on the trust relationship between subjects. It＇s imprecise and fuzzy. Targeting the above problems, this paper puts forward temporarily-spatially constrained trustworthy and delegable authorization model based on graph., which determines trustworthy delegated subject using fuzzy theory and adds the spatio-temporal constraint. It also analysis and solves cyclic and revoked authorization problems. The model meets the security needs as spatio-temporal constraint and trustworthy authorizations in applications, and has general applicability.
出处
《信息网络安全》
2012年第10期51-53,共3页
Netinfo Security
关键词
分布式环境
委托授权
可信赖度
时空约束
图
distributed environment
delegable authorization
trustworthiness
spatio-temporal constraint
graph
