Title: A new authenticated group key transfer protocol for actual network environment

Authors: Zhiwei Wang

Addresses: College of Computer, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210003, China; State Key Laboratory of Information Security, (Graduate University of Chinese Academy of Sciences), Beijing 100049, China; Key Lab of Broadband Wireless Communication and Sensor Network Technology, (Nanjing University of Posts and Telecommunications), Ministry of Education Jiangsu Province, Nanjing, Jiangsu 210003, China

Abstract: In this paper, we propose a new authenticated group key transfer protocol based on two-layers secret sharing. Our protocol is suitable for the actual network environment, in which there exists a chief server and several sub-servers. The chief server administrates these sub-servers, and each sub-server manages several users. In our protocol, the broadcasted message size is fixed and each group member only needs to compute two small degree interpolating polynomials to recover the group key. Thus, our protocol can be applied for the large size group. Furthermore, we provide authentication for transporting this group key.

Keywords: group key transfer protocol; two-layer secret sharing; Lagrange interpolating polynomials; authentication; networks.

DOI: 10.1504/IJAHUC.2013.052411

International Journal of Ad Hoc and Ubiquitous Computing, 2013 Vol.12 No.3, pp.188 - 192

Received: 10 Aug 2011
Accepted: 14 Mar 2012
Published online: 02 Mar 2013 *

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