Analysis and design of distributed hierarchical access control for multimedia networks
Ruidong Li, Jie Li, Hsiao‐Hwa Chen · GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. · 2005
To efficiently and effectively achieve the hierarchical access control for multimedia networks, in this paper we propose a distributed key management scheme whereby each SG (service group) maintains an SG server and give detailed analysis. In the proposed scheme, the server for a SG is utilized to manage the key tree and provide the related session keys for all the users in this SG. A detailed case study is provided, and we show that the communication overhead can be greatly reduced by O (n/sub O/ /spl middot/ log/sub d/n/sub O/), where n/sub O/ is the number of users in a SG, compared with employing an integrated key graph to the hierarchical access control problem. At the same time, the storage overhead for all users can be reduced by O(N), where N is the total number of users.