通信学报 ›› 2022, Vol. 43 ›› Issue (8): 131-141.doi: 10.11959/j.issn.1000-436x.2022162

• 学术论文 • 上一篇    下一篇

基于公平盲签名和分级加密的联盟链隐私保护方案

张学旺1,2, 黎志鸿1, 林金朝3   

  1. 1 重庆邮电大学软件工程学院,重庆 400065
    2 重庆大学微电子与通信工程学院,重庆 400004
    3 重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆 400065
  • 修回日期:2022-08-05 出版日期:2022-08-25 发布日期:2022-08-01
  • 作者简介:张学旺(1974- ),男,湖南祁东人,重庆大学博士生,重庆邮电大学副教授,主要研究方向为数据安全与隐私保护、区块链与物联网等
    黎志鸿(1997- ),男,四川成都人,重庆邮电大学硕士生,主要研究方向为区块链技术、互联网软件技术及安全等
    林金朝(1966- ),男,四川蓬溪人,博士,重庆邮电大学教授、博士生导师,主要研究方向为无线通信传输技术、BAN 与信息处理技术等
  • 基金资助:
    国家重点研发计划基金资助项目(2019YFC1511300);国家自然科学基金资助项目(U21A20447);南充市科技计划基金资助项目(21YFZJ0033)

Privacy protection scheme based on fair blind signature and hierarchical encryption for consortium blockchain

Xuewang ZHANG1,2, Zhihong LI1, Jinzhao LIN3   

  1. 1 School of Software Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
    2 College of Microelectronic and Communication Engineering, Chongqing University, Chongqing 400004, China
    3 Chongqing Key Laboratory of Photo Electronic Information Sensing and Transmitting Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Revised:2022-08-05 Online:2022-08-25 Published:2022-08-01
  • Supported by:
    The National Key Research and Development Program of China(2019YFC1511300);The National Natural Science Foundation of China(U21A20447);The Science and Technology Program of Nanchong(21YFZJ0033)

摘要:

为了解决联盟链应用场景中身份信息、交易数据存在的安全隐患,以及单级加密方法耗时的问题,提出了一种基于公平盲签名和分级加密的联盟链隐私保护方案。一方面,考虑公平盲签名方案存在中心化强、安全性差的缺陷,结合零知识证明技术对其重新设计,使之适用于联盟链应用场景;另一方面,基于 Paillier 同态加密算法,设计出可监管的分级加密方法。安全性分析及仿真实验结果表明,所提方案在实现对加密后的交易数据信息监管的同时,减少了加解密过程的时间开销;能有效抵抗篡改、窃听等恶意攻击,并使加密效率明显提升。

关键词: 联盟链, 公平盲签名, 零知识证明, 同态加密, 隐私保护, 分级加密

Abstract:

To solve the security hazards of identity information and transaction data and the time-consuming problem of traditional single-level encryption methods in the current application scenarios of consortium blockchain, a privacy protection scheme of consortium blockchain based on fair blind signature and hierarchical encryption was proposed.Considering the strong centrality and poor security of the existing fair blind signature scheme, it was redesigned with zero-knowledge proof technology to be applicable for consortium blockchain application scenario.Based on the Paillier homomorphic encryption algorithm, a supervisable hierarchical encryption method was designed, and the method realized the supervision of encrypted transaction data information and reduced the time cost of the encryption and decryption process.The security analysis and simulation results show that the proposed scheme can effectively resist malicious attacks such as tampering and eavesdropping and significantly improve the encryption efficiency.

Key words: consortium blockchain, fair blind signature, zero-knowledge proof, homomorphic encryption, privacy protection, hierarchical encryption

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