On January 28, 2022, China created the first technology innovation platform
for blockchain and privacy computing, providing strong support for solving
security issues such as multi-party collaboration and multi-party trust.
Blockchain realizes trusted storage of data, and privacy computing protects
entity secrets and provides trusted computing. If the data of privacy
computing is deployed to the blockchain and triggered by smart contracts,
various practical problems in the traditional field can be solved. This paper
builds a secure decentralized electronic voting application based on
blockchain and privacy computing technology to solve the security and privacy
issues in traditional voting systems.
This paper proposes a secure electronic voting scheme. In terms of secure
storage of trusted data, the blockchain and the smart contracts running on it
are used to provide a safe operating environment for information. The
information on the blockchain is publicly accessible to ensure the openness
and transparency of voting records; the smart contract will automatically
trigger calculations to avoid human intervention. In terms of secure execution
of trusted computing, blind signature protocols and homomorphic decryption
algorithms based on threshold cryptosystems are used. First, the Schnorr blind
signature protocol is introduced. The voting signature is not completely
dependent on a single signature agency, but is jointly generated by all
signature agencies and voters. Secondly, the voting statistics perform secure
calculations without disclosing the private key for decryption.At the same
time zero-knowledge proof ensures the verifiability of the information
released by the counting agency and enhances the robustness of the scheme.
Finally, it is proved that the proposed scheme meets the basic security
requirements of the electronic scheme, and has the characteristics of
decentralization and robustness.
This paper designs a secure electronic voting system based on Ethereum. First,
the core algorithm of this scheme is implemented in python, then the
construction and deployment of the entire voting system is completed in the
Ethereum development environment, and finally the performance of the system is
comprehensively analyzed through experimental data, and it is proved that the
proposed scheme can be applied to large-scale election activities.
Key words: electronic voting; threshold cryptosystem; blind signature;
blockchain; privacy computing
目次
择要
Abstract
第一章 绪论
1.1 课题研究背景与意义
1.2 国内外研究近况
1.3 本文的内容
1.4 结构安排
第二章 相干知识与技术
2.1 区块链相干知识
2.1.1 区块链
2.1.2 以太坊
2.2 暗码学相干知识
2.2.1 代数学知识
2.2.2 ElGamal暗码体制
2.2.3 安全多方盘算
2.2.4 门限暗码体制
2.2.5 可验证机密共享协议VSS
2.2.6 同指数零知识证明SEZ
第三章 安全的电子投票方案
3.1 电子投票的流程
3.2 电子投票的安全性分析
3.3 改进的协议
3.3.1 门限盲署名协议TBS
3.3.2 可验证的门限解密协议VTC
3.4 符号说明
3.4.1 安全性假设
3.4.2 实体与符号
3.5 投票过程概述
3.6 投票过程详情
3.6.1 准备阶段
3.6.2 密钥共享阶段
3.6.3 署名阶段
3.6.4 投票阶段
3.6.5 计票阶段
3.7 安全性与性能分析
3.7.1 安全性分析
3.7.2 性能分析
3.7.3 性能改进
第四章 系统计划
4.1 需求分析
4.1.1 参与人员分类
4.1.2 用例表格
4.1.3 非功能需求
4.2 总体计划
4.2.1 系统框架
4.2.2 接口计划
第五章 系统实现
5.1 环境搭建
5.2 根本算法
5.3 具体计划
5.3.1 管理模块计划
5.3.2 密钥共享模块计划
5.3.3 投票模块计划
5.3.4 计票模块计划
5.3.5 查询模块计划
5.4 实验分析
5.4.1 门限性能分析
5.4.2 智能合约gas分析
第六章 总结与展望
6.1 总结
6.2 展望
参考文献
致谢
最后