Democratic group signatures with linkability from gap Diffie-Hellman group |
| |
| Authors: | Yan-bin Liu Xiang-xue Li Hai-feng Qian Wen-zheng Zhang |
| |
| Institution: | (1) Department of Computer Science, ZunYi Normal College, Zunyi, 563002, China;(2) School of Information Security Engineering, Shanghai Jiaotong University, Shanghai, 200240, China;(3) Computer Science and Technology Department, East China Normal University, Shanghai, 200062, China;(4) National Laboratory for Modern Communications, Chengdu, 610041, China;(5) State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, 710071, China |
| |
| Abstract: | Democratic group signatures(DGSs) attract many researchers due to their appealing properties, i.e., anonymity, traceability and no group manager.Security results of existing work are based on decisional Diffie-Hellman(DDH) assumption.In this paper, we present a democratic group signature scheme based on any gap Diffie-Hellman(GDH) group where DDH problem is easily but computational Diffie-Hellman(CDH) problem is hard to be solved.Besides the properties of ordinary DGSs, our scheme also provides the property of linkability, i.e., any public verifier can tell whether two group signatures are generated using the same private key.Security properties of our scheme employ a new and independently interesting decisional product Diffie-Hellman(DPDH) assumption which is weaker than DDH one. |
| |
| Keywords: | democratic group signature GDH group anonymity traceability linkability |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
