Abstract: The rapid development of blockchain technology and the rise of cryptocurrency not only challenge traditional financial and asset management concepts but also bring about a series of privacy and security issues. Coin mixing technology is the primary means of privacy protection in blockchain. It is designed to improve the anonymity of transactions and protect the privacy of user identities. However, this enhanced anonymity also makes cryptocurrencies a tool for criminal activities such as money laundering, theft, and fraud. Therefore, there is an urgent need for a comprehensive review of technology for the identification, detection, and regulation of coin mixing services to support law enforcement agencies and promote cryptocurrency security compliance. This paper first systematically sorts out the technical principles and mechanism classification of coin mixing services, designs a general classification system of coin mixing tools, and discusses in detail the criminal activities that may be caused by coin mixing services. Then this paper focuses on the latest academic research progress of five coin-mixing regulatory technologies based on manual rules, address clustering, entity classification, abnormal transaction detection, and mixing service traceability, and summarizes the existing coin-mixing supervision-related tools in the industry. Finally, the challenges faced by coin mixing regulation are put forward, and future research directions are prospected.

摘要： 区块链技术的迅速发展与加密货币的兴起不仅挑战了传统的金融和资产管理观念，也带来了一系列隐私与安全方面的问题。加密货币混币技术作为区块链隐私保护的主要手段，它旨在提升交易的匿名性并保障用户身份的隐私。然而，这种增强的匿名性也使得加密货币成为洗钱、盗窃、欺诈等犯罪活动的工具。因此，亟须全面审视加密货币混币服务的识别、检测与监管技术的研究，以支持执法机构并促进加密货币的安全合规。首先系统地梳理了混币服务的技术原理与机制分类，设计了一套通用的混币工具分类体系，详细探讨了混币服务可能引发的犯罪活动；接着重点讨论了基于人工规则、地址聚类、实体分类、异常交易检测和混币服务追溯五种混币监管技术的最新学术研究进展，并总结了现有工业界中与混币监管相关的工具和平台；最后提出了混币监管目前所面临的挑战，为未来的研究方向提供展望。