【摘要】 区块链是具有去中心化、防篡改属性的分布式数据库，但由于区块链共同监管和高透明度的特点，也导致用户的隐私数据被公开泄露，从而使用户的隐私信息安全得不到保障.因此，隐私保护问题成为区块链数据安全研究的重点和难点.近年来，基于零知识证明技术的许多区块链隐私保护方案被提出，现存的解决方案虽已得到应用，但针对不同的应用场景仍存在着诸多缺点.本文对现有的基于零知识证明的区块链隐私保护技术进行了深入分析与比较，并对目前的保护方案进行阐述与总结，最后针对现有的区块链隐私保护方案存在的问题，提出未来可研究的重点，期望能够为区块链隐私保护的研究工作指明研究方向，并奠定坚实的工作基础.更多还原

【Abstract】 Block chain is a distributed database with the characteristics of decentralization, joint supervision and tamper-proof. However, the decentralization and high transparency of the block chain lead to the disclosure and leakage of traders’ private data, and the security of traders’ private information is not guaranteed. Therefore, the issue of block chain privacy protection is also the focus and difficulty of block chain data security research. In recent years, many block chain privacy protection schemes based on zero-knowledge proof technology are proposed, but there are still many demerits for different application scenarios. Aiming at the problems of privacy protection in block chain applications, the existing algorithm technology based on zero-knowledge proof technology are elaborated and summarized, and then privacy protection scheme based on zero-knowledge proof technology are analyzed and elaborated. Finally, in view of the demerit of the existing block chain privacy protection, the focus of future research is summarized and the direction for future research work is pointed out.更多还原