We present a solution to the problem of privacy invasion in a multiparty digital rights management scheme. (Roaming) users buy content licenses from a content provider and execute it at any nearby content distributor. Our approach, which does not need any trusted third party--in contrast to most related work on privacy-preserving DRM--is based on a re-encryption scheme that runs on any mobile Android device. Only a minor security-critical part needs to be performed on the device's smartcard which could, for instance, be a SIM card.
Traditional Digital Rights Management (DRM) systems are one level distributor system which involve single distributor. However, for a flexible and scalable content distribution mechanism, it is necessary to accommodate multiple distributors in DRM model so that different strategies can be implemented in diverse geographical areas. We develop a multiparty multilevel DRM model using facility location and design a prototype DRM system that provides transparent and flexible content distribution mechanism while maintaining the users' privacy along with accountability in the system.