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redactable consortium blockchain with access control:Leveraging chameleon hash and multi-authority attribute-based encryption

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High-Confidence Computing 2024年第1期4卷 14-23页

作者： Yueyan Dong Yifang Li Ye Cheng Dongxiao Yu School of Computer Science and Technology Shandong UniversityQingdao 266237China

A redactable blockchain allows authorized individuals to remove or replace undesirable content,offering the ability to remove illegal or unwanted *** control is a mechanism that limits data visibility and ensures that only authorized users can decrypt and access encrypted information,playing a crucial role in addressing privacy concerns and securing the data stored on a *** and access control are both essential components when implementing a regulated consortium blockchain in real-world situations to ensure the secure sharing of data while removing undesirable *** propose a decentralized consortium blockchain system prototype that supports redactability and access *** the development of a prototype blockchain system,we investigate the feasibility of combining these approaches and demonstrate that it is possible to implement a redactable blockchain with access control in a consortium blockchain setting.

关键词： Regulation Chameleon hash redactable blockchain Consortium blockchain

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Fine-Grained and Fair Identity Authentication Scheme for Mobile Networks Based on blockchain

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China Communications 2022年第6期19卷 35-49页

作者： Mengjuan Zhai Yanli Ren Guorui Feng Xinpeng Zhang School of Communication and Information Engineering Shanghai UniversityShanghai 200444China Zhengzhou Xinda Institute of Advanced Technology Zhengzhou 450001HenanChina

With the popularity of the internet,users hope to better protect their privacy while obtaining network ***,in the traditional centralized authentication scheme,identity information such as the user's private key is generated,stored,and managed by the network *** can't control their identity information,which will lead to a great threat to the privacy of *** on redactable blockchain,we propose a fine-grained and fair identity authentication scheme for mobile *** our proposed scheme,the user's identity information is generated and controlled by the *** first propose a notion of score chameleon hash(SCH),which can delete or update the information of illegal users so as to dynamically update the status of users and provide users with more fine-grained and fair *** propose another notion of self-updating secret sharing(SUSS),which allows users to update the trapdoor and the corresponding hash key after redacting the blockchain without requiring trusted authority to redistribute the *** results show that,compared with the immutable blockchain Bitcoin,the redactable blockchain in our identity authentication scheme provides users with fine-grained and fair redacting functions,and can be adopted with a small additional overhead.

关键词： identity authentication secret sharing chameleon hash redactable blockchain

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