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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/12172

Title: Analysis and Improvement on a Contributory Group Key Exchange Protocol Based on the Diffie-Hellman Technique
Authors: Tseng, Yuh-Min;WU, Tsu-Yang
Contributors: 數學系
Keywords: Contributory property;Group key agreement;Provable security;Decisional Diffie-Hellman problem
Date: 2010
Issue Date: 2012-07-03T03:45:36Z
Publisher: IOS Press
Abstract: In 2008, based on the two-party Diffie-Hellman technique, Biswas proposed a contributory group key exchange protocol called the Group-DH protocol. This contributory property is an important one of group key agreement. Unfortunately, in this paper we show that the proposed Group-DH protocol is not a contributory group key exchange protocol. Therefore, we propose an improved group key exchange protocol with verifiably contributory property based on the same Diffie-Hellman technique. When an identical group key is constructed, each participant can confirm that his/her contribution is actually included in the group key. We show that the improved protocol is provably secure against passive attacks under the decisional Diffie-Hellman assumption. As compared to the previously proposed group key exchange protocols, our protocol provides contributiveness and the required computational cost is suitable for low-power participants in a network environment.
Relation: Informatica, 21(2): 247-258
Appears in Collections:[數學系] 期刊論文

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