An Efficient Fair Off-line Electronic Cash Scheme Design  

作　　者：WANGChangji WUJianping 

机构地区：[1]NetworkResearchCenter,TsinghuaUniversity,Beijing100084,China

出　　处：《Chinese Journal of Electronics》2004年第2期370-372,共3页电子学报（英文版）

摘　　要：This paper introduces the notion of restrictive partially blind signature scheme, which is the integration of partially blind signature scheme and restrictive blind signature scheme. Successively, this paper presents a fair off line electronic cash scheme based on the restrictive partially blind signature scheme. The expiry date and denomination are embedded in the electronic coin.Thus bank just needs to keep undue electronic coins in his coin database, which alleviates the storage pressure for the bank to check double spending. Moreover, bank needs not use different public keys for electronic coin with different denominations, and shops/users need not carry a list of bank's public keys to verify the electronic coin with different denominations. The number of modular exponentiation operations is reduced for both the user and the bank, which is achieved by introducing a new signature of proof of knowledge in the withdrawal protocol and letting the trusted third party publish two different public keys other than in previous fair off line electronic cash scheme.The scheme security is based on the random oracle model and decision Diffle-Hellman assumption.

关 键 词：局部盲签名 约束盲签名 知识证据 离线电子货币 

分 类 号：F830.46[经济管理—金融学] TN492[电子电信—微电子学与固体电子学]