Design and Analysis of Multicast Key Management for Near-Video-on-Demand Services

• Main Authors: Sheng-Chih Wang, 王聖智
• Other Authors: Yie-Tarng Chen
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/r7wjc6

碩士 === 國立臺灣科技大學 === 電子工程系 === 94 === With rapid progress in the network technology, video-on-demand (VOD) services have launched commercial operation. Key management is critical for secure Video-On-Demand services. However, most existing secure group key management schemes that only address a single multicast group cannot be efficiently applied to VOD services. In this research, we propose a multi-group key management scheme for Near-Video-on-Demand (N-VOD) services. First, we use sequential pattern mining algorithm to obtain frequent video access patterns. Then, we cluster members who join or leave simultaneously to construct a novel Group-Oriented Logical Key Tree, which can efficiently distribute and update the group key by batch re-keying. Moreover, we investigate a marking algorithm to balance the group-oriented logical key tree. In addition, we use both analysis and computer simulations to evaluate the performance of the proposed scheme. The results indicate that, the proposed scheme can effectively reduce re-keying overhead and re-keying frequency, in comparison with conventional secure group key management.