| 摘要: |
| 区块链是一种分布式的数据库，是比特币等数字货币的核心技术，受到学术界和产业界广泛关注和研究。区块链具有去中心化、去信任、高度透明等特点，在金融、医疗、政府、军事等领域有重要的应用价值。区块链账本公开透明的特点方便了节点对交易的验证，但同时带来了用户的隐私保护问题。用户的身份、交易金额等内容很容易被泄漏，对其的保护是近几年区块链隐私保护的研究热点。另外，隐私保护基础上的监管问题也备受关注，因为隐私保护本身可能会助长恶意行为，隐藏恶意用户的身份、非法内容等。因此如何做到隐私保护与监管之间的平衡也是区块链技术走向实际应用面临的重要问题。本文总结了目前已有的区块链隐私保护与监管方法，分析了这些方法的实现原理及存在的问题，最后对区块链隐私保护与监管技术未来的研究方向进行了展望。 |
| 关键词: 区块链 隐私保护 监管 环签名 零知识证明 |
| DOI：10.19363/J.cnki.cn10-1380/tn.2021.05.10 |
| Received:April 24, 2019Revised:June 15, 2019 |
| 基金项目:本课题得到国家重点研发计划（No.2017YFB0802500），广西密码重点实验室的开放课题（No.GCIS201909），山东省重大科技创新工程（No.2019JZZY020129）资助。 |
|
| Research progress of blockchain privacy protection and supervision technology |
| LI Peili,XU Haixia,MA Tianjun |
| State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China;Guangxi key laboratory of Cryptography and Information Security, Guilin 541004, China;Data Assurance and Communication Security Research Center, Chinese Academy of Sciences, Beijing 100087, China;State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China;Data Assurance and Communication Security Research Center, Chinese Academy of Sciences, Beijing 100087, China;School of Cyber Security, University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: |
| Blockchain is a distributed database and is the core technology of digital currency such as Bitcoin. It has received extensive attention and research from academia and industry. Blockchain has the characteristics of decentralization, trust, and high transparency. It has important application value in the financial, medical, government, military and other fields. The transparent feature of the blockchain facilitates the verification of the transaction by the node, but at the same time brings the privacy protection problem of the user. Users’ identity, transaction amount and other contents are easy to be disclosed, and the protection of them has become a research hotspot of blockchain privacy protection in recent years. In addition, supervision issues based on privacy protection are also of concern, as privacy protection itself may indulge malicious behavior, hide the identity and illegal content of malicious users and so on. Therefore, how to achieve the balance between privacy protection and supervision is also an important issue when facing practical applications. This article summarizes the current blockchain privacy protection and supervision methods, analyzes the implementation principles and existing problems of these methods, and finally looks into the future research directions of blockchain privacy protection and supervision technologies. |
| Key words: blockchain privacy protection supervision ring signature zero knowledge proof |
