普适计算的访问控制研究

普适计算环境是由移动用户、系统的服务、嵌入在物理环境的传感器和资源组成的联合环境．用户在该环境中能够在任何时间任何地点访问资源．但是保证这样应用的安全是很困难的，因为相互合作的实体具有事先不可预知性，传统的在静止的、封闭的环境中基于身份的访问控制方法是行不通的．提出了普适计算的动态访问控制模型．模型的操作过程表明它适合普适计算应用．

Research on access control for pervasive computing

Pervasive computing environment is viewed as an incorporate space in which it comprises mobile users, system services, system resource, and sensors embedded in the physical environment. Users can visit resources and obtain services anytime anywhere. However, the ubiquitous and mobile environment presents a new challenge. It is unsuit- able for pervasive computing environment that entities are not foreknow for each other to use identity-based access control that suitable for static and closed environment. In this paper, a dynamic access control model for pervasive computing is presented, which can be used to secure pervasive computing applications.