Multiple-Bank E-Cash without Random Oracles

摘要：

　　Multiple-bank e-cash (electronic cash) model allows users and merchants to open their accounts at different banks.Most e-cash systems in the literature have been proposed in the single bank model in which clients and merchants have accounts at the same bank.In re cent years, some multiple-bank e-cash systems were proposed, but they were proven secure in the random oracle model.In this paper, based on the Groth-Sahai proof system and Ghadafi group blind signature, we construct a multiple-bank e-cash system which is proven secure in the standard model.We achieve the dual privacy requirement (i.e., the user anonymity and bank anonymity) by using the group blind signature.Our scheme can also trace the identity of the signer.At last, some security properties of our scheme, such as anonymity, unforgeability, identifica tion of the double spender and exculpability, are proved in the standard model.

关键词： multiple-bank e-cash group blind signature automorphic blind signature Groth-Sahai proofs

作者: Jiangxiao Zhang Zhoujun Li Hua Guo

作者单位: State Key Laboratory of Software Development Environment,Beihang University,Beijing 100191,PRC

会议类型: 国际会议

会议名称: The 5th International Symposium on Cyberspace Safety and Security ( CSS2013)(第五届国际网络空间安全和安保研讨会)

会议地点: 张家界

会议语种:英文

页码: 40-51

在线出版日期: 2013-11-13（万方平台首次上网日期，不代表论文的发表时间）