Abstract
Digital rights management (DRM) system is widely used to restrict the illegal content consumption. However, to achieve security and accountability, the system loses privacy. In addition, multiparty multilevel (MPML) DRM system maintains single private key generator (PKG), which completely eliminates online lookup in a large network. In this paper, we present a hierarchical identity based encryption (HIBE) scheme for MPML DRM. In the proposed scheme, we use 2-level HIBE in which a trusted party act as a root PKG and each domain PKG act as a first level authorities, which are responsible to generate the private keys for the entities of their domains. Further, we address a commutative encryption based content key acquisition scheme to achieve privacy.
Published Version
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