Anonymous Pairing-Free and Certificateless Key Exchange Protocol for DRM System

Mostly, current security architectures for Digital rights management (DRM) systems use either Public Key Cryptography (PKC) or Identity-based Public Key Cryptography (ID-PKC). However, PKC has a complex certificate management and ID-PKC has a key escrow problem. Certificateless Public Key Cryptography (CL-PKC) has some attractive properties which seem compatible with the requirements of DRM systems. In this paper, we present anonymous pairing-free certificateless authenticated key exchange (CL-AKE) protocol for DRM system which provides a mechanism for distributing licenses in a flexible and secure manner. Furthermore, the analyses demonstrate that our scheme is efficient and secure.