【摘要】 访问控制策略是PMI(授权管理基础设施)中的重要因素,它决定着PMI系统的灵活性和适应应用的能力。通过分析目前广泛存在的3种访问控制策略DAC、MAC及RBAC的优势与不足,提出了将三者有机结合、实现一种基于条件的访问控制策略。利用XACML语言对策略进行了描述,并对采用这种策略的PMI系统进行了设计和部分功能的实现。更多还原

【Abstract】 Access control policy is the key factor in PMI,which decides PMI system’s flexibility and adaptability to applications.A condition-based access control policy was put forward on analysis of advantages and disadvantages of DAC,MAC and RBAC,which are widely-used access control policies nowadays.The new policy was described by XACML and PMI system based on this policy was designed and partly implemented.更多还原