Authors: Ruidong Li, Jie Li, Hsiao-Hwa Chen
Addresses: Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba Science City 305-8573, Japan. ' Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba Science City 305-8573, Japan. ' Institute of Communications Engineering, National SunYat-Sen University, Kaohsiung, Taiwan, ROC
Abstract: Hierarchical access control for group communication provides access control which can assure that group members can subscribe different data streams or possibly multiples of them in a multimedia network. In this paper, to efficiently and effectively achieve this goal, we propose a Distributed Key Management Scheme (DKMS) whereby each Service Group (SG) maintains a SG server and give detailed analysis. In the proposed scheme, the server for a SG is utilised to manage the key tree and provide the related session keys for all the users in this SG. Detailed analysis is provided and we show that the communication overhead can be greatly reduced by O(n0 logd n0), where n0 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.
Keywords: access control; group communication; key management; multimedia networks; distributed control; security.
International Journal of Security and Networks, 2007 Vol.2 No.1/2, pp.3 - 10
Published online: 16 Mar 2007 *Full-text access for editors Access for subscribers Purchase this article Comment on this article