An efficient key tree management algorithm for LKH group key management

Authors:
Deuk-Whee Kwak;SeungJoo Lee;JongWon Kim;Eunjin Jung
Affiliations:
Backbone Network Research Team, Telecommunication Network Laboratory, KT, Daejeon, Korea;Networked Media Lab., Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea;Networked Media Lab., Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea;Department of Computer Sciences, The University of Texas at Austin, Texas
Venue:
ICOIN'06 Proceedings of the 2006 international conference on Information Networking: advances in Data Communications and Wireless Networks
Year:
2006

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Abstract

The efficiency and security of secure group communication are dependent on the group key manager (GKM), which manages the group keys and membership Although a GKM can employ any kind of group key management algorithm, we adopt the logical key hierarchy (LKH) in this paper for its efficiency and scalability LKH is a tree-based group key management algorithm and it is more efficient when the key tree is balanced However, only a few papers or documents have dealt with practical tree balancing techniques so far In this paper, we propose LKHTreeManager, an LKH key tree management algorithm that is efficient for a large and highly dynamic secure group The proposed technique efficiently manages the key tree by combining LKH and AVL (Adelson-Velskii and Landis) tree We show that LKHTreeManager reduces the membership processing time, as well as the number of key messages.