一种去中心化且可追责的可编辑区块链方案
A Decentralized and Accountable Redactable Blockchain Scheme
赖明曦 1杜瑞颖 1陈晶 1何琨1
作者信息
- 1. 空天信息安全与可信计算教育部重点实验室,武汉大学国家网络空间安全学院,湖北武汉 430072
- 折叠
摘要
区块链具有不可修改特性,能永久保存链上数据的同时,也导致了链上的有害数据无法删除、错误数据无法更新.已有的可编辑区块链研究实现了区块链数据可编辑的功能,但是存在编辑权力中心化的问题,这与区块链去中心化的理念不符.同时,现有方案在验证编辑区块时,存在无法追责的问题.为此,提出了一种去中心化且可追责的可编辑区块链方案.该方案设计了去中心化的变色龙哈希函数,通过多个用户节点协同生成变色龙哈希陷门,以实现去中心化的方式管理陷门.增加随机选择阶段和对编辑节点的审查追责阶段,实现对编辑权力的可控监管.对本方案进行了安全性分析,分析结果表明该方案兼具可编辑性和可行性,并以各个阶段的算法运行时间为评估指标,与现有可编辑区块链方案进行了对比实验,实验结果表明该方案具有比较好的运行效率.
Abstract
The blockchain is immutable and can permanently store data on the chain,but it also prevents harmful data from being deleted and incorrect data from being updated.Existing redactable blockchain schemes endow the blockchain with the function of data editing.However,the existing research has the problem of centralizing of editing power,which violates the idea of blockchain decentralization.At the same time,the existing schemes have an accountability problem when verifying the edited block.To this end,a decentralized and accountable redactable blockchain scheme is proposed.In this scheme,a decentralized chameleon Hash function is designed to generate chameleon Hash trapdoors through multiple user nodes to manage trapdoors in a decentralized manner.A random selection stage and a review and accountability stage for editing nodes are added to achieve controllable supervision of editing rights.A security analysis of this scheme is conducted,and the analysis results show that the scheme is both editable and feasible.The algorithm running time of each stage is used as the evaluation index,and the comparison experiment is conducted with the existing redactable blockchain scheme,the experimental results show that the scheme has better running efficiency.
关键词
可编辑区块链/去中心化/变色龙哈希/密钥管理Key words
redactable blockchain/decentralization/chameleon Hash/key management引用本文复制引用
基金项目
国家重点研发计划(2021YFB2700200)
国家自然科学基金(61772383)
国家自然科学基金(U1836202)
国家自然科学基金(62076187)
国家自然科学基金(62172303)
湖北省自然科学基金(2020CFB628)
出版年
2024
NETL
NSTL
万方数据