Digital Rights Management (DRM) is a type of access-control technology
that is used by diverse content providers to restrict the use of digital content. Enterprise
Digital Rights Management (E-DRM) is an application of DRM techniques for managing
the control of access to sensitive documents in an enterprise. In this paper, we propose a
group key distribution system for E-DRM based on the concept of a secret-sharing mechanism
and the generalized Aryabhata remainder theorem (GART). To the best of our
knowledge, no previous publications related to E-DRM technologies have presented the
group key distribution system that we propose. In our system, different groups of enterprise
members within the enterprise obtain different digital content in parallel without
collision by using their group’s unique session key; all members within each group share a
common session key to decrypt the same digital documents to acquire the correct content.
We proved that our system achieves the goal of providing high security, which includes
preventing inside and outside attacks and offering forward and backward secrecy.