In blockchain technology, data are stored on decentralized nodes and public to each node in the blockchain network. Hence, the focus of privacy protection in the blockchain guarantees the anonymity of transactions such that attackers cannot attain the users’ personal information through data analysis. Among the existing privacy protection technologies, the scheme based on group signature has good anonymity, but the existing scheme exists a large number of operations that are difficult to apply to wireless terminals. In this paper, using the powerful offloading capability of edge computing, we propose a blockchain node traceable identity privacy technology scheme based on threshold group signature, and the scheme greatly reduces the computing burden of nodes while achieving node privacy protection.

在区块链技术中，数据存储在去中心化的节点上，并对区块链网络中的每个节点公开。因此，区块链隐私保护的重点是保证交易的匿名性，使得攻击者无法通过数据分析获取用户的个人信息。在现有的隐私保护技术中，基于群签名的方案具有较好的匿名性，但现有方案存在大量难以应用于无线终端的操作。本文利用边缘计算强大的卸载能力，提出了一种基于阈值组签名的区块链节点可追溯身份隐私技术方案，该方案在实现节点隐私保护的同时，大大减轻了节点的计算负担。