【摘要】 为了解决联盟链在参与数据互通、信息交换、跨链交互中身份隐私泄露的问题，提出了一种满足跨链监管要求，基于联盟链跨链交易的可控匿名身份隐私保护模型。考虑到各联盟链身份异构，数字证书的实名特性，提出一种基于群签名的联盟链跨链交易背书策略。群签名基于SDH假设和双线性群中的决策性假设，满足群的安全性特征和正确性要求。能够实现对跨链信息的正确签名上链，达到匿名共享信息的目的。更多还原

【Abstract】 In order to solve the problem of identity privacy leakage in the data exchange,information exchange and cross-chain interaction of the consortium blockchain,a controllable anonymous identity privacy protection model based on cross-chain transaction is proposed to match the requirements of cross-chain supervision. Considering the identity heterogeneity of consortium blockchain and the real name features of digital certificates,a cross-chain transaction endorsement strategy based on group signatures is proposed. Group signature is based on the SDH assumption and the decision assumption in bilinear groups,which satisfies the security features and correctness requirements of groups. It can realize the correct signature on the cross-chain information and achieve the purpose of anonymous information sharing.更多还原