Through the development of communication and computer technology, on the open network, it h:as been increased that requirements of group oriented communication application services. Among them, the multicast infrastructure has become a widely discussed researching topic However the research of the security properties that safety, efficiency and scaleability in a multicast structure, has not been enough In this study, we discuss conventional multicast key management structures and analysis the security properties of them Also we propose a scalable secure multicast key management structure and compare it with conventional schemes.
