基于层次化群签名的联盟链身份隐私保护方案  

Consortium Blockchain Identity Privacy Protection Scheme Based on Hierarchical Group Signature

作　　者：张学旺[1] 雷响 Zhang Xuewang;Lei Xiang(School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065)

机构地区：[1]重庆邮电大学软件工程学院,重庆400065

出　　处：《信息安全研究》2024年第12期1160-1164,共5页Journal of Information Security Research

基　　金：重庆市城市管理科研基金项目(城管科字2023第35号);渝北区社会事业与民生保障科技创新专项重点基金项目(2021(农社)18)。

摘　　要：针对联盟链中身份隐私泄露及恶意节点威胁问题,提出了一种基于层次化群签名与秘密共享算法的身份隐私保护方案.该方案基于椭圆曲线密码学和分布式秘密共享技术,实现了多方参与的密钥对生成和多层签名过程,旨在增强成员身份保密性.特别地,方案通过分布式秘密共享技术强化了主群体私钥的安全性,确保其恢复必须依赖于多个子群体成员的协作,有效减少了单点故障或恶意节点活动导致的隐私泄露风险.理论分析与实验验证均证明了所提方案在匿名性和效率方面具有显著优势,有效防止了签名伪造和隐私泄露.Addressing the issues of identity privacy leakage and malicious node threats in consortium blockchains,this paper proposes an identity privacy protection scheme that integrates hierarchical group signatures with secret sharing algorithms.This scheme,based on elliptic curve cryptography and distributed secret sharing technology,achieves multiparty participation in key pair generation and multilayered signature processes,aiming to enhance the confidentiality of member identities.Specifically,the scheme strengthens the security of the master group private key through distributed secret sharing technology,ensuring that its recovery depends on the collaboration of multiple subgroup members,effectively reducing the risk of privacy leakage caused by single points of failure or malicious node activities.Theoretical analysis and experimental validation demonstrate that the proposed scheme offers significant advantages in terms of anonymity and efficiency,effectively preventing signature forgery and privacy leakage.

关 键 词：联盟链 层次化群签名 隐私保护 秘密共享 哈希函数 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]