网络与信息安全学报 ›› 2020, Vol. 6 ›› Issue (3): 19-29.doi: 10.11959/j.issn.2096-109x.2020033

所属专题: 区块链

• 专栏:隐私保护新技术探索 • 上一篇    下一篇

按需披露的区块链隐私保护机制

李少卓(),王娜,杜学绘   

  1. 信息工程大学,河南 郑州 450000
  • 修回日期:2020-04-30 出版日期:2020-06-01 发布日期:2020-07-01
  • 作者简介:李少卓(1995- ),男,山西大同人,信息工程大学硕士生,主要研究方向为信任管理、区块链|王娜(1980- ),女,山西临汾人,博士,信息工程大学副教授,主要研究方向为云计算安全、网络空间安全|杜学绘(1968- ),女,河南新乡人,博士,信息工程大学教授、博士生导师,主要研究方向为大数据安全、云计算安全和信息系统多级安全
  • 基金资助:
    国家重点研发计划(2018YFB0803603);国家自然科学基金(61502531);国家自然科学基金(61702550);国家自然科学基金(61802436)

Privacy protection mechanism of on-demand disclosure on blockchain

Shaozhuo LI(),Na WANG,Xuehui DU   

  1. Information Engineering University,Zhengzhou 450000,China
  • Revised:2020-04-30 Online:2020-06-01 Published:2020-07-01
  • Supported by:
    The National Key R&D Program of China(2018YFB0803603);The National Natural Science Foundation of China(61502531);The National Natural Science Foundation of China(61702550);The National Natural Science Foundation of China(61802436)

摘要:

隐私保护已经成为区块链技术真正从理论到现实应用必须解决的关键问题。实际应用中存在一种按需披露的隐私保护需求,受组播安全通信机制的启发,提出一种按需披露的区块链隐私保护机制(PPM-ODB,privacy protection mechanism of on-demand disclosure on blockchain)。该机制通过改进基于RSA的匿名多接收者加密方案来实现隐私信息一对多的加解密、知情者的匿名性保护和隐私泄露的可追溯,通过采用 Quorum 链隐私保护机制来实现密钥在隐私信息拥有者和知情者间的安全高效分发。实验证明了PPM-ODB 机制可保证隐私数据的保密性,及其在时间和存储开销上的优越性,并建议知情者的个数少于100,以获得良好的用户体验。

关键词: 区块链, 隐私保护, Quorum, 匿名多接收者方案

Abstract:

Privacy protection has become the key problem that blockchain technology must solve from theory to practice.There is a privacy protection requirement of on-demand disclosure in practical applications.Inspired by multicast secure communication mechanism,a privacy protection mechanism of on-demand disclosure on blockchain was proposed.This mechanism improves the RSA based anonymous multi receiver encryption scheme to realize the disclosure of the private data on the blockchain only to the permitted informed,the anonymity protection of the informed and the traceability of the privacy disclosure.The Quorum blockchain privacy protection mechanism is adopted to realize the safe and efficient distribution of the key between the owner of the private information and the informed.Finally,it is proved that PPM-ODB mechanism can guarantee the privacy of privacy data and its superiority in time and storage cost,and it is suggested that the number of informed people should be less than 100 to obtain a good user experience.

Key words: blockchain, privacy protection, Quorum, anonymous multi receiver encryption scheme

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