基于数字承诺的区块链交易金额保密验证方法

doi:10.11896/jsjkx.200800123

计算机科学 ›› 2021, Vol. 48 ›› Issue (9): 324-329.doi: 10.11896/jsjkx.200800123

基于数字承诺的区块链交易金额保密验证方法

张小艳, 李秦伟, 付福杰

贵州大学计算机科学与技术学院贵阳550025贵州省公共大数据重点实验室贵阳550025

收稿日期:2020-08-19 修回日期:2020-11-18 出版日期:2021-09-15 发布日期:2021-09-10
通讯作者: 李秦伟(1539614676@qq.com)
作者简介:1057879450@qq.com
基金资助:
国家自然科学基金(61802081);贵州省公共大数据重点实验室开放项目(2017BDKFJJ003)

Secret Verification Method of Blockchain Transaction Amount Based on Digital Commitment

ZHANG Xiao-yan, LI Qin-wei, FU Fu-jie

College of Computer Science and Technology,Guizhou University,Guiyang 550025,ChinaGuizhou Provincial Key Laboratory of Public Big Data,Guiyang 550025,China

Received:2020-08-19 Revised:2020-11-18 Online:2021-09-15 Published:2021-09-10
About author:ZHANG Xiao-yan,born in 1996,postgraduate.Her main research interests include information security and blockchain technology.
LI Qin-wei,born in 1961,professor,master supervisor.His main research interests include information security,blockchain and privacy protection.
Supported by:
National Natural Science Foundation of China(61802081) and Key Laboratory Open Project of Public Big Data of Guizhou Province,China(2017BDKFJJ003)

摘要/Abstract

摘要： 传统区块链交易中,隐私保护都是在匿名机制下加密用户的敏感信息,引入公正的第三方对交易明文信息进行验证,然而一旦第三方受到攻击,用户的交易信息便会被泄露,且在理性状态下不存在真正公正的第三方。为了能够更好地解决区块链交易中存在的隐私问题,针对交易者非匿名状态下的交易金额保密验证问题,采用PVC数字承诺协议,将交易金额隐藏在承诺中,并构造公开可验证的零知识证明方案,使验证者能在不获取交易敏感信息的情况下对交易的合法性进行保密验证。同时,利用椭圆曲线同态加密特性加密金额,进而解决交易者密文账本的更新问题。对所提出的隐私保护方案的正确性进行验证和分析,结果表明,与已有方案相比,所提方案具有计算复杂度相对较低、安全性强、高效等优点。

关键词: 区块链, PVC数字承诺, 保密验证, 公开可验证, 椭圆曲线同态加密

Abstract: In traditional blockchain transactions,privacy protection is to encrypt users' sensitive information under the anonymity mechanism,and a trusted third party is involved to verify the transaction plaintext information.However,once the third party is attacked,the users' transaction information will be divulged.Furthermore,there is no truly trusted third party in a rational state.To better solve the privacy problems in blockchain transactions,and in view of issues of confidentiality verification of the tra-ders' transaction amount under the non-anonymous state,the PVC digital commitment protocol is adopted to hide the transaction amount in the commitment,and a publicly verifiable zero-knowledge proof scheme is established,so that verifiers are able to confidentially verify the legitimacy of the transaction without obtaining sensitive information from the traders.At the same time,the elliptic curve homomorphic encryption feature is used to encrypt the amount,thereby solving the problem of updating the traders' ciphertext ledger.The correctness of the proposed privacy protection scheme is verified and analyzed,and the results shows that compared with the existing schemes,the proposed scheme has the advantages of relatively low computational complexity,strong security and high efficiency.

Key words: Blockchain, PVC digital commitment, Confidentiality verification, Publicly verifiable, Elliptic curve homomorphic encryption

中图分类号:

TP309

张小艳, 李秦伟, 付福杰. 基于数字承诺的区块链交易金额保密验证方法[J]. 计算机科学, 2021, 48(9): 324-329.

ZHANG Xiao-yan, LI Qin-wei, FU Fu-jie. Secret Verification Method of Blockchain Transaction Amount Based on Digital Commitment[J]. Computer Science, 2021, 48(9): 324-329.

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基于数字承诺的区块链交易金额保密验证方法

Secret Verification Method of Blockchain Transaction Amount Based on Digital Commitment

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