An improved access control model for digital products shopping System

The prevalence of the Internet has promoted the development of the electronic commerce. Digital products shopping system appeared in peoples´ eyes. The security problems become very important. The core is how to guarantee the secure and flexible access of the digital products. As the most promising access control model, Usage control has been generally accepted. But the trust problem is the shortcoming of the model. In this paper, the usage control will be improved to apply in the digital products shopping system.