The enhancement of anonymity for blockchain users received much attention. However, in some cases tracing user’s identity is also very important, especially to expose illegal transactions. In this paper, we propose an identity tracing scheme and implement it using a simple and efficient proof method. In particular, we design a new signature scheme that is used to generate a user’s certificate, and present a binding method for the user’s certificate and trading public key. Users only need to register once with the supervision center, and then the center may trace sender’s identity of the transactions on the blockchain. Our scheme is suitable to blockchain-based systems that explicitly use public/private key pairs, and does not affect the anonymity property of the original system.

区块链用户匿名性的增强倍受关注。但是，在某些情况下，跟踪用户的身份也非常重要，尤其是暴露非法交易时。在本文中，我们提出了一种身份跟踪方案，并使用一种简单有效的证明方法来实现它。特别是，我们设计了一种用于生成用户证书的新签名方案，并提出了用于用户证书和交易公钥的绑定方法。用户只需要在监管中心注册一次，然后该中心就可以在区块链上跟踪交易的发件人身份。我们的方案适用于显式使用公钥/私钥对的基于区块链的系统，并且不会影响原始系统的匿名性。