Title :
Fast rekeying of multidimensional hierarchical tree in multi-object multimedia multicast
Author :
Xu, Shouzhi ; Chen, Wenqin ; Tan, Yunmeng ; Sesay, Samba ; Liu, Wei
Author_Institution :
Dept. of Electron. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Multi-object multimedia multicast services consist of users that subscribe to different secure levels or different sets of data streams. These services need a security mechanism to ensure hierarchical access control. Existing methods based on traditional schemes are not efficient for multi-object multicasts. In this paper, we present a multi-dimensional hierarchical tree scheme that maintains all members with different access privileges in an integrated way, and propose a fast rekeying algorithm based on minimum exact covering theory. Compared with recent works, the proposed scheme can greatly improve the efficiency of group updating in terms of time cost, bandwidth.
Keywords :
multicast communication; multidimensional systems; multimedia communication; telecommunication services; data streams; fast rekeying algorithm; hierarchical access control; minimum exact covering theory; multidimensional hierarchical tree; multiobject multimedia multicast services; security mechanism; Access control; Bandwidth; Costs; Data engineering; Multicast algorithms; Multidimensional systems; Multimedia systems; Partial response channels; Samarium; Streaming media;
Conference_Titel :
Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9538-7
DOI :
10.1109/ISCIT.2005.1567107