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Open Access

An Improved ID-Based Group Key Agreement Protocol

Kangwen Hu, Jingfeng Xue, Changzhen Hu, Rui Ma, Zhiqiang Li( )
School of Software, Beijing Institute of Technology, Beijing 100081, China.
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Abstract

ID-based constant-round group key agreement protocols are efficient in both computation and communication, but previous protocols did not provide valid message authentication. An improvement based on attack analysis is proposed in this paper. The improved method takes full advantage of the data transmitted at various stages of the protocol. By guaranteeing the freshness of authentication messages, the authenticity of the generator of authentication messages, and the completeness of the authenticator, the improved protocol can resist various passive and active attacks. The forward secrecy of the improved protocol is proved under a Katz-Yung (KY) model. Compared with existing methods, the improved protocol is more effective and applicable.

Keywords

group key agreement protocolIDforward secrecynonsuper-singular elliptic curve

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Tsinghua Science and Technology
Volume 19 Issue 5,
October 2014
Pages 421-428
DOI: 10.1109/TST.2014.6919818
Cite this article:
Hu K, Xue J, Hu C, et al. An Improved ID-Based Group Key Agreement Protocol. Tsinghua Science and Technology, 2014, 19(5): 421-428. https://doi.org/10.1109/TST.2014.6919818

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Received: 15 April 2014
Revised: 07 July 2014
Accepted: 15 July 2014
Published: 13 October 2014
© The Author(s) 2014
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