摘要
区块链具有去中心化、可追溯、不可篡改等特性,但其不可篡改性使得链上一些违法信息被永久保留。针对这一问题,提出基于委员会机制的可编辑区块链方案。首先,通过随机抽签算法选取委员会成员;接着,结合基于权益证明共识机制,对用户编辑请求采用投票共识的去中心化编辑策略;最后,利用变色龙哈希函数修改链上数据;此外,引入问责机制防止用户作恶,论证了该方案的安全性和收敛性。模拟实验验证,所提方案能够在去中心化的环境下高效地修改区块内容,且不影响区块链的一致性。
The blockchain has the characteristics of decentralization,traceability,and immutability.However,its immutability makes some illegal information on the chain permanently retained.To solve this problem,a redactable blockchain scheme based on committee mechanism is proposed.First,the committee members are selected by applying the random sortition algorithm.Then,a decentralized editing strategy of voting consensus with the consensus mechanism is adopted based on proof of stake for users'editing requests.In addition,the chameleon hash function is used to modify the data on the chain and an accountability mechanism is introduced to prevent users from malicious actions.Finally,the security and convergence of the scheme are demonstrated theoretically,and simulation results verify that the proposed scheme can efficiently modify the block content in a decentralized environment without affecting the consistency of the blockchain.
作者
刘亚
李昌辉
赵逢禹
任艳丽
LIU Ya;LI Changhui;ZHAO Fengyu;REN Yanli(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Department of Information and Intelligent Engineering,Shanghai Publishing and Printing College,Shanghai 200093,China;School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2024年第1期120-126,共7页
Journal of Beijing University of Posts and Telecommunications
基金
上海市自然科学基金项目(22ZR1481000)。
关键词
区块链
可编辑
委员会机制
加密抽签
blockchain
redactable
committee mechanism
cryptographic sortition
