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Growing numbers of users and many access control policies which involve many different resource attributes in service-oriented environments bring various problems in protecting resource.This paper analyzes the relationships of resource attributes to user attributes in all policies, and propose a general attribute and rule based role-based access control(GAR-RBAC) model to meet the security needs. The model can dynamically assign users to roles via rules to meet the need of growing numbers of users. These rules use different attribute expression and permission as a part of authorization constraints, and are defined by analyzing relations of resource attributes to user attributes in many access policies that are defined by the enterprise. The model is a general access control model, and can support many access control policies, and also can be used to wider application for service. The paper also describes how to use the GAR-RBAC model in Web service environments. 相似文献
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<正>一、固定资产投资增幅较大,重点项目建设取得新突破1.项目投资完成情况较好2007年,珠海市交通固定资产投资完成比上 相似文献
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一、港口生产特点
1.货物吞吐量快速增长
2005年珠海市港口累计完成货物吞吐量3556.9万吨,为历史上首次突破3500万吨大关,比上年增长11.0%。 相似文献
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一、港口生产特点1.货物吞吐量快速增长2005年珠海市港口累计完成货物吞吐量3556.9万吨,为历史上首次突破3500万吨大关,比上年增长11.0%。⑴主体港区主导地位继续巩固。高栏港区完成1826万吨,居于主导地位,其占全港总量的比重已由上年的50.2%提高到51.3%,增了1.1个百分点。其他 相似文献
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2001年珠海港口系统认真贯彻落实以积极的财政政策和稳健的货币政策为主要内容的一系列扩大内需的方针政策,积极稳妥地推进结构调整和各项改革,扎实工作,锐意进取,港口经济平稳运行,各项工作进展顺利.统计数据表明,2001年货物吞吐量等主要指标都保持了不同程度的增长. 相似文献
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Introduction Medical information systems cover a numberof medical domains to satisfy different medical ap-plications and characterized by the rich functionali-ties and valuable medical case data[1,2 ] .But infor-mation systems are heterogeneous and lack of effi-cient knowledge organization mechanisms.So theredundant information is existing,and real time in-formation acquisition and updating is difficult andmedical information systems are hard to interoper-ate and implementcomplex medical a… 相似文献
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