Efficient Dynamic Threshold Group Signature Scheme Based on Elliptic Curve Cryptosystem |
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Authors: | XIA Xiang-sheng HONG Fan GENG Yong-jun CUI Guo-hua |
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Affiliation: | 1. School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Computer, Wuhan Polytechnic University, Wuhan 430023, China 2. School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract: | The short secret key characteristic of elliptic curve cryptosystem (ECC) are integrated with the (t,n ) threshold method to create a practical threshold group signature scheme characterized by simultaneous signing. The scheme not only meets the requirements of anonymity and traceability of group signature but also can withstand Tseng and Wangs conspiracy attack. It allows the group manager to add new members and delete old members according to actual application, while the system parameters have a little change. Cryptanalysis result shows that the scheme is efficient and secure. |
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Keywords: | Elliptic curve cryptosystem Group signature Threshold scheme Dynamic threshold group signature |
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