Blockchain provides a distributed ledger recording a globally agreed, immutable transaction history, which may not be suitable for Fintech applications that process sensitive information. This paper aims to solve three important problems for practical blockchain applications: privacy, authentication and auditability. Private transaction means that the transaction can be validated without revealing the transaction details, such as the identity of the transacting parties and the transaction amount. Auditable transaction means that the complete transaction details can be revealed by auditors or law enforcement agencies. Authenticated transaction means that only authorized parties can be involved in the transaction. Auditability prevents a malicious user from abusing the privacy property. Authenticity helps the auditor to trace the identity of the malicious user in the system. In this paper, we present a private, authenticated and auditable consortium blockchain, using a number of cryptographic building blocks. Our scheme can be integrated with the architecture of consortium blockchain. ¹

区块链提供了一个分布式账本，记录了全球约定的，不变的交易历史，这可能不适合处理敏感信息的金融科技应用程序。本文旨在解决实际区块链应用中的三个重要问题：隐私，身份验证和可审计性。私人交易意味着可以在不透露交易细节（例如交易方身份和交易金额）的情况下验证交易。可审计交易是指审计员或执法机构可以披露完整的交易详细信息。认证交易意味着只有授权方可以参与交易。可审核性可防止恶意用户滥用隐私属性。真实性可帮助审核员追踪系统中恶意用户的身份。在本文中，我们提出了一个私有的，经过身份验证且可审核的财团区块链，其中使用了许多密码构建块。我们的方案可以与联盟区块链的架构集成。^1个