J. Wang (USA) and X. Qi (PRC)
Differentially secure multicast, key management, mul ticast, LKH
Differentially secure multicast is a generalized secure multicast model, where both data and group members are classified into different security levels. In this pa per, we study the key management problem for differ entially secure multicast. Two key management pro tocols are proposed, both of which are extensions of the logical key hierarchy (LKH) scheme. One is called data security level LKH and the other is called user security level LKH. We then discuss how to extend them to distributed key management protocols. Sim ulations are conducted to compare these two protocols and identify various conditions under which one pro tocol may work better than the other.
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