【摘要】 现有的访问控制机制大多局限在用户个人空间内的数据,难以控制个人空间以外的数据,例如用户不能对其在朋友空间中发布的评论进行访问控制,不能对共有的资源进行联合访问控制等。面向社交网络的多方授权模型MRuleSN采用单一所有、多方共有的方法处理所有权问题,采用扩展的w-Datalog规则表达授权,具有更强的灵活性、访问细粒度和表达能力。分析并说明了模型的规则结构、授权语言的语法和语义,最后通过示例说明了该模型的应用和表达能力。更多还原

【Abstract】 Most of the current access control mechanisms focus on data of private space of users,which cannot control the data beyond the personal space,such that the remarks published by a user in the space of his friend cannot be controlled by the user and the shared resource cannot be controlled jointly by the sharer.The paper presented the MRuleSN,a multi-party authorization model for social networks.The model processes the problem of ownership by single ownership and multi-party shareholders,and adopts extended w-Datalog rules to express authorization,which owns more powerful flexibility,fine-grained access control and authorization expressiveness.The rule structure,syntax and semantic of authorization language of the model were analyzed and explained.Finally,application and expressiveness of the model were exampled and discussed.更多还原