Key management scheme for multi-layer secure group communication
COMSNETS'09 Proceedings of the First international conference on COMmunication Systems And NETworks
Key management scheme for multiple simultaneous secure group communication
IMSAA'09 Proceedings of the 3rd IEEE international conference on Internet multimedia services architecture and applications
Key management schemes for multilayer and multiple simultaneous secure group communication
ISRN Communications and Networking
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An important application of multicasting is group-oriented multimedia communication, such as video-on-demand and video conferencing. Before these services can be successfully deployed, security infrastructures must be developed to ensure access control to multicast content. In this paper, we present a multi-group key management scheme tailored to multimedia multicast services that distribute data in multi-layer or multi-object format. Compared with the existing tree-based key management schemes that are used for generic data multicasting services, the proposed scheme can reduce the communication overhead by a factor of (M + 1)/2 and M is the number of layers. For example, when the multimedia data is encoded into three layers according to different quality requirements, the proposed scheme reduces the communication overhead associated with key updating by 50%.