| A Fair Off-Line Electronic Cash Scheme Based on Restrictive Partially Blind Signature |
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| 引用本文： | 王常吉 吴建平 段海新. A Fair Off-Line Electronic Cash Scheme Based on Restrictive Partially Blind Signature[J]. 清华大学学报, 2004, 9(4): 441-443,481 |
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| 作者姓名： | 王常吉 吴建平 段海新 |
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| 作者单位： | NetworkResearchCenter,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | the Post-Doctor Foundation of China (No. 2003033155) and the National Natural Science Founda-tion of China (No. 60203004) |
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| 摘 要： | A fair off-line electronic cash scheme was presented based on a provable secure restrictive partially blind signature. The scheme is more efficient than those of previous works as the expiry date and denomination information are embedded in the electronic cash, which alleviates the storage pressure for the bank to check double spending, and the bank need not use different public keys for different coin values, shops and users need not carry a list of bank‘s public keys to verify in their electronic wallet. The modular exponentiations are reduced for both the user and the bank by letting the trustee publish the public values with different structure as those of previous electronic cash schemes. The scheme security is based on the random oracle model and the decision Diffie-Hellman assumption. The scheme can be easily extended to multi-trustees and multi-banks using threshold cryptography.
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| 关 键 词： | 公正离线电子货币方案 分布盲签名 安全性 公共密钥 限制性盲签名 |
A Fair Off-Line Electronic Cash Scheme Based on Restrictive Partially Blind Signature |
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| WANG Changji,WU Jianping,DUAN Haixin Network Research Center,Tsinghua University,Beijing ,China. A Fair Off-Line Electronic Cash Scheme Based on Restrictive Partially Blind Signature[J]. Tsinghua Science and Technology, 2004, 9(4): 441-443,481 |
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| Authors: | WANG Changji WU Jianping DUAN Haixin Network Research Center Tsinghua University Beijing China |
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| Affiliation: | WANG Changji,WU Jianping,DUAN Haixin Network Research Center,Tsinghua University,Beijing 100084,China |
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| Abstract: | |
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| Keywords: | partially blind signature restrictive blind signature fair electronic cash scheme |
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