Privacy rights management in multiparty multilevel DRM system
Proceedings of the International Conference on Advances in Computing, Communications and Informatics
Unlinkable content playbacks in a multiparty DRM system
DBSec'13 Proceedings of the 27th international conference on Data and Applications Security and Privacy XXVII
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A content distribution mechanism for DRM needs to satisfy the security and accountability requirements while respecting the privacy of the parties involved. However, achieving privacy along with accountability in the same framework is not easy as the requirement for achieving these attributes are conflicting each other. Most of the current content distribution mechanisms rely on trusted third parties to achieve privacy along with these attributes. In this paper, we propose a privacy preserving content distribution mechanism without requiring trust over any third party by using the mechanisms of blind decryption and one way hash chain. We prove that our scheme is not prone to the 'oracle problem' of the blind decryption mechanism. Our mechanism supports revocation of even malicious users without violating their privacy.