A DRM Scheme Based On Oblivious Transfer Protocol

Digital rights management (DRM) is becoming a vital important technology to protect intellectual property of digital contents, control their dissemination and usage, and technically guarantee the legal usage in their life cycle under the digital network circumstances. Nowadays, whether personal privacy could be preserved has already been a key factor whether users will accept the service. Unfortunately, most of the DRM systems pay more attention to how to protect the provider and the distributor of the digital contents'rights and economic profit, but they haven't efficiently overcome the problem of preserving user's privacy during purchasing contents.Oblivious transfer is one of the important elements of cryptography; it can be used as a building block for more complex secure protocols, or as stand-alone protocol for privacy-preserving in ecommerce. Aiming at the problem of the consumers'privacy preserving on Digital Rights Managements, in this paper we propose a new DRM scheme basing on oblivious transfer (OT) after researching on DRM and Oblivious Transfer protocol. By issuing encrypted digital licenses to users by group, the new scheme could efficiently preserve users'privacy by hiding the users'choices of contents from the license server. Thus efficiently balance the benefit and requirement of each role in the digital contents value chain, and promote the development of the whole digital market. In the end the author does security and feasibility analysis towards this scheme.