A Novel License Distribution Mechanism in DRM System

Recently, distribution is required in many DRM systems. However current distribution mechanisms appear to use restriction for distribution. In this paper, we propose a distribution mechanism based on using different licenses for different distributions. Particularly, we focus on taking interference to replace restriction and using degressive secret keys chain to control superdistribution. Advertisements are introduced as interference for compensation. More and more advertisements are shown as the distribution process furthers. And this mechanism can work in both off-line and on-line situations since secret keys in licenses are transformed directly.