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ISRN Communications and Networking
Volume 2012 (2012), Article ID 383218, 11 pages
http://dx.doi.org/10.5402/2012/383218
Research Article

Key Management Schemes for Multilayer and Multiple Simultaneous Secure Group Communication

1Department of Computer Science and Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572103, India
2Department of Computer Science and Engineering, National Institute of Technology, Warangal, Andhra Pradesh 506004, India

Received 22 March 2012; Accepted 18 April 2012

Academic Editors: G. Horng and H.-L. Wei

Copyright © 2012 R. Aparna and B. B. Amberker. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Many emerging applications are based on group communication model and many group communications like multimedia distribution and military applications require a security infrastructure that provides multiple levels of access control for group members. The group members are divided into a number of subgroups and placed at different privilege levels based on certain criteria. A member at higher level must be capable of accessing communication in its own level as well as its descendant lower levels but not vice versa. In this paper we propose a key management scheme for this multilayer group communication. We achieve substantial reduction in storage and encryption cost compared to the scheme proposed by Dexter et al. We also address periodic group rekeying. Applications like scientific discussion and project management may lead to a scenario in which it is necessary to set up multiple secure groups simultaneously, and few members may be part of several secure groups. Managing group keys for simultaneous secure groups is critical. In this paper we propose a novel key management scheme for multiple simultaneous groups.