Abstract
To solve the scalability and high delay problem in Application-Layer Multicast (ALM) group key management,SOKM,a self-organized large-scale hierarchical ALM group key management scheme was proposed. In this scheme,a special node in each cluster was chosen to be Key Server (KS),which confined the updating and management of group keys in cluster only. Analysis and simulations show that,compared with MHKM scheme,SOKM has the advantages of reducing the probability of KS being attacked and key forwarding delay,which lead to higher security of multicast group and key forwarding rate,although the computation rises. Consequently,MHKM has preferable scalability.
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