摘要
随着用户对数据隐私安全需求的提升及相关隐私保护条例的制定,擦除匿名、公开、不可变地存储在区块链中的非法数据已成为受害者及国际刑警组织的迫切需求。基于变色龙哈希、共识投票等技术对区块链的历史数据进行编辑,能有效地擦除区块链上的非法数据,保证用户数据的被遗忘权。文章先以比特币交易为例分析区块链上非法数据插入的常见方法;再综合分析和对比已有的3类可编辑区块链方案;针对现有方案容易遭受攻击、编辑权限被集中控制等问题,文章提出了一种基于去中心化变色龙哈希的区块链数据可编辑方案。此外,文章对所提方案进行了详细的安全性分析和性能分析。分析结果表明,所提方案不仅具有抗双花攻击、抗篡改攻击的能力,还能以较低的计算消耗和较高的效率实现区块链历史数据的可编辑。
With the increasing demand for users'data privacy and the formulation of related privacy protection regulations,erasing the illegal data which is anonymously,publicly,and immutably stored in the blockchain has become an urgent requirement for victims and Interpol.Redacting the history data of the blockchain based on technologies such as chameleon hash and consensus voting can effectively erase the illegal data from the blockchain and guarantee the right to be forgotten of users'data.In this paper,we start with analyzing the harmful data insertion method with Bitcoin transaction taken as an example.Then we comprehensively analyze and compare three types of redactable blockchain schemes.Finally,for some issues of existing schemes such as suffering from attacks and centralized control of redactions,we propose a scheme to redact blockchain data based on a decentralized chameleon hash function.Moreover,we analyze the details of security and performance of the proposed scheme.The analyses show that the proposed scheme not only resists double-spending attacks and tampering attacks but also performs redactions with lower overhead and higher efficiency.
作者
廖晓峰
张迪
LIAO Xiao-feng;ZHANG Di(College of Computer Science, Chongqing University, Chongqing 400044, China)
出处
《广州大学学报（自然科学版）》
CAS
2021年第3期1-8,共8页
Journal of Guangzhou University:Natural Science Edition
基金
国家重点研发计划资助项目(2018AAA0100101)
国家自然科学基金资助项目(61932006,61772434)
重庆市技术创新与应用发展专项面上资助项目(cstc2020jscx-msxmX0156)。
