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基于Brands体制的强不可伪造电子货币系统

Overspending Unforgeable E-cash Scheme Based on Brands' System
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摘要 针对Brands电子支付体制在电子货币被重复使用时所存在的安全漏洞,即获取同一电子货币不同支付信息的攻击者可以以用户的身份重复使用该货币,通过引入知识的零知识证明以及概率加密等工具,提出了一个新的公正电子货币系统的设计方案,实现了在货币被重复使用时的强不可伪造性。同时该系统即使在银行或用户密钥被泄露时,仍然可以保证整个系统的安全性。其安全性基于随机Oracle模型和限制性盲签名假设。 By using of zero-knowledge proofs of knowledge and probabilistic encryption scheme,a new fair e-cash system is proposed which can overcome the security limits of the Brands e-cash system,that is if there is a fault in a user module,allowing a coin to be overspent,then anyone who got the transcripts of the spent coin cannot further overspend the coin as ever.In other words,the new system fulfills the request of overspending unforceable.Meanwhile,this e-cash scheme is secure even if the secret key of the user or the bank is revealed.The security of our system is based on random oracle model and restrictive assumption of blind signature.
作者 吴铤 许剑良
出处 《计算机工程与应用》 CSCD 北大核心 2006年第13期227-229,共3页 Computer Engineering and Applications
基金 国家自然科学基金资助项目(编号:10271307) 浙江省自然科学基金重点资助项目(编号:ZD0101) 浙江省自然科学基金资助项目(编号:M603028) 浙江省教育厅高校科研资助项目(编号:20030639)
关键词 信息安全 电子货币系统 限制性盲签名 知识的零知识证明 Brands体制 information security,E-cash scheme,restrictive blind signature,Zero-knowledge proofs of knowledge,Brands' system
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参考文献9

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