Vector space access structure and ID based distributed DRM key management

Abstract

We present an effective DRM architecture with multi distributors that facilitates client mobility and propose a family of flexible key management mechanisms for this system coupling Identity-Based Encryption (IBE) with vector space secret sharing. Our proposed DRM architecture provides scalability of business model and allows to make proper business strategies for different regions and cultures. The encrypted digital content sent by a package server can only be decrypted by the DRM client and is protected from attacks by other parties/servers in the system. Our key management protects the key used to encrypt a digital content during its delivery from the package server to the DRM client, not only from purchasers but also from the distribution servers and the license server. The IBE enables efficiency gains in computation time and storage over the existing certificate-based Public Key Infrastructure (PKI) based approaches as no certificate management and verification is needed by the entities in the system. © 2011 Springer-Verlag.