基于Elgamal强盲签名的区块链电子投票方案研究  

Research on Blockchain Electronic Voting Scheme Based on Elgamal Strong Blind Signature

作　　者：邵清[1] 洪皓洁 李斌 SHAO Qing;HONG Hao-jie;LI Bin(School of Optional Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《小型微型计算机系统》2021年第11期2400-2406,共7页Journal of Chinese Computer Systems

基　　金：国家重点研发计划项目(2018YFB1700902)资助。

摘　　要：电子投票因其便捷高效的特性,应用范围很广.针对现有电子投票方案中存在的隐私泄漏、无法公开验证等安全性问题,本文提出一种新的电子投票方案.该方案采用基于Elgamal的强盲签名算法,打破投票者身份与签名之间的联系,使得选票内容无人知晓,保护了投票者与候选者的隐私.通过区块链技术保证选票不被篡改,任何人都可以对选票进行验证,并用智能合约有效取代传统的可信第三方,实现了自动计票.在选票接收过程中引入不可链接支付技术(Unlinkable payments),使得交易接收者的公钥不可逆推,保护了选票接收者的隐私.安全性分析及性能分析表明,所提方案满足电子投票协议的安全性要求,与现有方案相比,具有较强的匿名性和隐私性,且计票效率有一定提高,具有可行性.Electronic voting is widely used because of its convenience and efficiency.Aiming at the security problems in the existing electronic voting schemes,such as privacy disclosure and non-public verification,this paper proposes a new electronic voting scheme.In this scheme,Elgamal based strong blind signature algorithm is adopted to break the connection between voter identity and signature,so that the content of ballot is unknown,thus protecting the privacy of voters and candidates.This scheme uses blockchain technology to ensure that ballots are not tampered.Anyone can verify the ballots.And this scheme uses smart contracts to effectively replace traditional trusted third parties,realizing automatic vote counting.Unlinkable payments are introduced in the process of ballot receiving,which makes the public key of the transaction receiver irreversible and protects the privacy of the ballot receiver.The security analysis and performance analysis show that the proposed scheme meets the security requirements of the electronic voting protocol.Compared with the existing scheme,it has stronger anonymity and privacy.Moreover,the scheme is feasible and the counting efficiency has been improved.

关 键 词：区块链 电子投票 强盲签名 不可链接支付 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]