DKMS: distributed hierarchical access control for multimedia networks

Authors:
Ruidong Li;Jie Li;Hsiao-Hwa Chen
Affiliations:
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
Venue:
International Journal of Security and Networks
Year:
2007

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Abstract

Hierarchical access control for group communication providesaccess control which can assure that group members can subscribedifferent data streams or possibly multiples of them in amultimedia network. In this paper, to efficiently and effectivelyachieve this goal, we propose a Distributed Key Management Scheme(DKMS) whereby each Service Group (SG) maintains a SG server andgive detailed analysis. In the proposed scheme, the server for a SGis utilised to manage the key tree and provide the related sessionkeys for all the users in this SG. Detailed analysis is providedand we show that the communication overhead can be greatly reducedby O(n0 logd n0), wheren0 is the number of users in a SG, compared withemploying an integrated key graph to the hierarchical accesscontrol problem. At the same time, the storage overhead for allusers can be reduced by O(N), where N is the total number ofusers.