Dynamic access control model for pervasive computing
普适计算环境下的动态访问控制模型

The state of subjects/objects and the current context have the decisive effect on the authorization result in pervasive computing environment. Focusing on the problem that current authorization models use simple states of subjects/objects and the context information leads to failure in pervasive computing environment, a novel dynamic access control model based on the state of subjects/objects and the current context was proposed. The main elements, the architecture and the authorization algorithm of the model were described. Compared to the existing authorization models, the unified scheme of the context information proposed to affect the authorization result enhances the expression ability of the model, and makes the model simple as well. The model is more suitable for pervasive computing environment.