Secure Group Key Management Approach Based Upon N-Dimensional Hyper-Sphere
Secure group communication systems become more and more important in many emerging network applications. For a secure group communication system, an efficient and robust group key management approach is essential. In this paper, a new group key management approach with a group controller GC using the theory of hyper-sphere is developed, where a hyper-sphere is constructed for the group and each member in the group corresponds to a point on the hyper-sphere, which can be called the member's private point. The GC computes the central point of the hyper-sphere, whose distance from each member's private point is identical. The central point is published and each member can compute a common group key via the square of the radius.