文献类型：期刊文献

中文题名：改进的基于可验证洗牌的混币协议

英文题名：Improved coin mixing protocol based on verifiable shuffle

作者：郦文俊[1];徐贤[1];万明超[2];李春淼[2]

机构：[1]华东理工大学计算机科学与工程系,上海200237;[2]北京微芯区块链与边缘计算研究院,北京100080

年份：2025

卷号：45

期号：11

起止页码：3486

中文期刊名：计算机应用

外文期刊名：journal of Computer Applications

收录：;北大核心:【北大核心2023】；

基金：上海市2024年度“科技创新行动计划”项目(24BC3200500,24BC3200300)。

语种：中文

中文关键词：区块链;混币;可验证洗牌;以太坊;零知识证明

外文关键词：blockchain;coin mixing;verifiable shuffle;Ethereum;zero-knowledge proof

摘要：针对现有以太坊上混币协议在性能和安全性上的瓶颈与限制,提出一种改进的基于可验证洗牌的混币协议EncMix。该协议首先引入可验证洗牌机制,确保所有参与者的资金流动完全不可追踪;其次,结合ElGamal加密技术和Chaum-Pedersen零知识证明,实现了取款的匿名性;最后,通过优化智能合约的逻辑减少不必要的计算步骤,从而减少混币流程所消耗的gas量。实验结果显示,相较于现有的MixEth协议,EncMix在一次完整的混币过程中减少了至少20万gas的成本;此外,在预言机模型下证明了EncMix协议具有匿名性、可用性和防盗性。可见EncMix在提升性能和节省成本的同时,保证了区块链交易的安全性,还能为去中心化金融应用提供更可靠的技术支持,并带来可观的经济价值。
To address the bottlenecks and limitations in performance and security of existing coin mixing protocols on Ethereum,an improved coin mixing protocol based on verifiable shuffle,named EncMix,was developed.Firstly,a verifiable shuffle mechanism was incorporated to ensure that the fund flows of all participants remained completely untraceable.Next,ElGamal encryption combined with Chaum-Pedersen zero-knowledge proof was used to significantly strengthen anonymity.Finally,smart contract logic was optimized to eliminate unnecessary computational steps,thereby reducing the gas consumption required for the coin mixing process.Experimental results showed that,compared to the existing MixEth protocol,EncMix reduced costs by at least 200000 gas per full coin mixing operation.Furthermore,under random oracle model,the EncMix protocol was proven to possess anonymity,availability,and theft-proof characteristics.In conclusion,EncMix enhances performance and reduces costs while ensuring the security of blockchain transactions,providing more robust technical support for decentralized finance applications and generating considerable economic value.