支持协作的强制访问控制模型  

Collaboration Supported Mandatory Access Control Model

作　　者：范艳芳[1] 蔡英[1,2,3] 

机构地区：[1]北京信息科技大学计算机学院,北京100101 [2]信息安全国家重点实验室(中国科学院信息工程研究所),北京100093 [3]网络文化与数字传播北京市重点实验室,北京100101

出　　处：《计算机研究与发展》2015年第10期2411-2421,共11页Journal of Computer Research and Development

基　　金：北京市高等学校青年英才计划基金项目(YETP1499);网络文化与数字传播北京市重点实验室开放课题(ICDD201408;ICDD201510);中国科学院信息工程研究所信息安全国家重点实验室开放课题(2014-16)

摘　　要：按照国家信息系统等级保护要求,3级以上的信息系统必须具备强制访问控制和标记.已有的强制访问控制模型的访问规则十分严格,难以满足协作环境下的访问控制新需求.提出一种支持协作的强制访问控制模型(collaboration supported mandatory access control model,CSMAC),将主体-客体为中心的访问控制与任务为中心的访问控制相结合,使访问控制模型更符合主动安全模型的特点,大大提高了模型的灵活性,使其更适合于协作环境下的访问控制.模型中通过控制主客体的安全标记,解决了符合安全策略的敏感信息的双向流动问题.通过无干扰理论,对所提出模型的安全性进行了证明.According to the national classified protection of information system,information systems whose levels are above three must provide mandatory access control and label.Due to rigid access control rules,existing mandatory access control models are difficult to satisfy the new requirements of collaborative environment.In this paper,we firstly analyze the requirements of access control in collaborative environment.Then,we propose the access control policies according to a very popular scenario.And then,we propose a mandatory access control model with collaboration supported and prove the security of the model by noninterference theory.At last,we compare this models with other related models,and use an application example to show the application of this model.In general,this model integrates task-centric access control with the subject-object-centric access control.The flexibility of the model is greatly enhanced and this model can be considered as an active access control model which is more perfect to be used in collaborative environment.Through controlling the security label of subjects and objects,the bi-directional information flow which is compliant with security policies is solved.

关 键 词：协作 强制访问控制 主动安全模型 信息流 任务 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]