区块链用户匿名与可追踪技术

区块链具有透明性、数据完整性、防篡改等优点，在金融、政府、军事等领域有重要应用价值。目前有越来越多的工作研究区块链的隐私保护问题，典型的包括门罗币、Zerocash, Mixcoin等等。这些隐私保护方法可以用于保护区块链上用户的身份和交易的金额。隐私保护方案是双刃剑，一方面是对合法用户隐私的完善保护，另一方面如果完全脱离监管，则是对洗钱、勒索等违法犯罪行为的姑息和纵容。针对区块链上各种层出不穷的隐私保护方案，监管也要与时俱进。该文研究区块链用户身份的隐私保护和监管方法，提出了用户匿名和可追踪的技术，旨在推动区块链在实际中的应用。

Blockchain User Anonymity and Traceability Technology

Blockchain has the advantages of transparency, data integrity, tamper resistance, etc., and has important application value to the fields of finance, government, and military. There are many work to study the privacy protection of the blockchain, typically including Monero, Zerocash, Mixcoin, and more. Their privacy protection methods can be used to protect the identity of the user and the amount of the transaction. The privacy protection scheme is a double-edged sword. On the one hand, it is the perfect protection of the privacy of legitimate users. On the other hand, if it is completely out of supervision, it is the appeasement and connivance of illegal crimes such as money laundering and extortion. In response to the various endangered privacy protection schemes on the blockchain, regulation must also keep pace with the times. In view of this, the privacy protection and supervision methods of blockchain user’s identity is studied, and anonymity and traceability technology to promote the application of blockchain to practice is proposed.