@inproceedings{a3bf4ca9cb7047d6908b2d340ae79126,
title = "Redactable Transactions in Consortium Blockchain: Controlled by Multi-authority CP-ABE",
abstract = "The immutability of blockchain means that data in blockchain cannot be modified once confirmed. It guarantees the reliability and integrity of blockchain. However, absolute immutability is not conducive to timely correction of blockchain. Currently, there are some researches on redactable blockchain. They replaced hash functions with chameleon hash functions or proposed policy-based chameleon hashes, which may lead to the centralization of redaction right or single point of failure. We propose a multi-authority policy-based chameleon hash by combining chameleon-hashes with ephemeral trapdoors and multi-authority attribute-based encryption, and prove its security. Users who satisfy the access policies can perform modification operations while the rest have no permission. In addition, we give a proof-of-concept implementation of a redactable blockchain, building on Hyperledger Fabric source code. It only requires minimal changes to the current transaction structure and hash computation, etc. Our results show that the latency is still in millisecond with 20000 concurrent redactable transactions.",
keywords = "Blockchain, Hyperledger Fabric, Multi-authority attribute-based encryption, Redaction",
author = "Zongyang Zhang and Tong Li and Zhuo Wang and Jianwei Liu",
note = "Publisher Copyright: {\textcopyright} 2021, Springer Nature Switzerland AG.; 26th Australasian Conference on Information Security and Privacy, ACISP 2021 ; Conference date: 01-12-2021 Through 03-12-2021",
year = "2021",
doi = "10.1007/978-3-030-90567-5\_21",
language = "英语",
isbn = "9783030905668",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "408--429",
editor = "Joonsang Baek and Sushmita Ruj",
booktitle = "Information Security and Privacy - 26th Australasian Conference, ACISP 2021, Proceedings",
address = "德国",
}