论文介绍了角色规范属性证书和角色指派属性证书，讨论了基于角色的PMI体系结构，探讨了基于角色PMI的电子政务安全模型。
The role specification AC and role assignment AC are introduced, the role-based PMI architecture and the role-based PMI security model for E-government is discussed and researched in the paper.
论文介绍了角色规范属性证书和角色指派属性证书，讨论了基于角色的PMI体系结构，探讨了基于角色PMI的电子政务安全模型。
The role specification AC and role assignment AC are introduced, the role-based PMI architecture and the role-based PMI security model for E-government is discussed and researched in the paper.
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