In multimedia consuming, Digital Rights Management (DRM) is the important means to con¯rm the bene¯ts of both digital contents/services providers and consumers. To keep the DRM system running in order, risk management should be adopted, which identi¯es and assesses the DRM system's security level. Now, the legitimate sharing of copyrighted digital content is still an open issue, which faces severe risks of propertied assets circumvention and copyright infringe-ments. In this paper, we try to highlight a multi-disciplinary method for all-around examinations on risks to digital assets in the contents sharing scenario. The method is a qualitative and quantitative fuzzy risk assessment, which is used for estimating a novel concept called Risk-Controlled Utility (RCU) in DRM. Then, we emphasize on an application case of the emerging trusted computing policy, and analyze the in°uences of di®erent content sharing modes. Finally, we address a business model with some simulation results. The comparison with other methods shows that the fusion of qualitative and quantitative styles can not only evaluate the RCU with uncertain risk events e®ectively, but also provide accurate assessment data for the security policies of DRM.