中文摘要：

分析了现今高度动态和分布式环境下,传统的访问控制模型已不能满足信息访问的需要,并由此引出了下一代访问控制模型——使用控制模型（usage control,UCON）。将UCON与传统访问控制模型进行了比较,分析了UCON的定义及组成成分,给出了UCON的16种基本核心模型形式化描述及应用实例,分析了UCON的具体实现框架,最后指出了目前研究的难点和需要解决的关键问题。

英文摘要：

In today＇ s highly dynamic and distributed environment, the traditional access control models can not meet the need of the information access. The next generation access control model usage control （UCON） model, was presented. The UCON model was first compared with the traditional access control models, and then the components and definition of the model were discussed. The 16 types of basic core models of UCON was formalized and the application instances were given, The implementation frame of UCON was also presented, Finally, the difficulties of research and the existing problems that must be solved were pointed out.