An efficient group key management scheme for secure multicast with multimedia applications

In this paper we present an efficient and scalable group key management scheme for secure one-to-many multicast. The proposed scheme has several advantages over existing protocols. It supports dynamic subgrouping and does not require reliable multicast service to provide key distribution. In addition, a one-way hash function is adopted to handle massive member join and move requests efficiently without secret key transmissions and encryption/decryption computations. We also demonstrate how to deploy fast MPEG encryption algorithms and digital rights management systems to the scheme. The proposed group key management scheme is especially suitable for delay-sensitive multimedia multicast applications and resource-constraint equipments