Fine-grained and controllably redactable blockchain with harmful data forced removal

Notoriously, immutability is one of the most striking properties of blockchains. As the data contained in blockchains may be compelled to redact for personal and legal reasons, immutability needs to be skillfully broken. In most existing redactable blockchains, fine-grained redaction and effective d...

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Main Authors: HOU, Huiying, HAO, Shidi, YUAN, Jiaming, XU, Shengmin, ZHAO, Yunlei
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Language:English
Published: Institutional Knowledge at Singapore Management University 2021
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Online Access:https://ink.library.smu.edu.sg/sis_research/7563
https://ink.library.smu.edu.sg/context/sis_research/article/8566/viewcontent/3680359_pvoa_cc_by.pdf
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Institution: Singapore Management University
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spelling sg-smu-ink.sis_research-85662022-11-29T06:58:28Z Fine-grained and controllably redactable blockchain with harmful data forced removal HOU, Huiying HAO, Shidi YUAN, Jiaming XU, Shengmin ZHAO, Yunlei Notoriously, immutability is one of the most striking properties of blockchains. As the data contained in blockchains may be compelled to redact for personal and legal reasons, immutability needs to be skillfully broken. In most existing redactable blockchains, fine-grained redaction and effective deletion of harmful data are mutually exclusive. To close the gap, we propose a fine-grained and controllably redactable blockchain with harmful data forced removal. In the scheme, the originator of the transaction has fine-grained control over who can perform the redaction and which portions of the transaction can be redacted. The redaction transaction is performed after collecting enough votes from miners. All users can provide the index of the block containing the harmful data to receive rewards, which are borne by the malicious user who initially posted the data. Miners can forcibly remove the harmful data based on the index. The malicious user will be blacklisted if the reward is not paid within a period of time, and any transaction about such user will not be performed later. In addition, the scheme supports the redaction of additional data and unexpended transaction output (UTXO) simultaneously. We demonstrate that the scheme is secure and feasible via formal security analysis and proof-of-concept implementation. 2021-05-01T07:00:00Z text application/pdf https://ink.library.smu.edu.sg/sis_research/7563 info:doi/10.1155/2021/3680359 https://ink.library.smu.edu.sg/context/sis_research/article/8566/viewcontent/3680359_pvoa_cc_by.pdf http://creativecommons.org/licenses/by-nc-nd/4.0/ Research Collection School Of Computing and Information Systems eng Institutional Knowledge at Singapore Management University Fine grained Fine-grained control Formal security analysis blockchain Information Security
institution Singapore Management University
building SMU Libraries
continent Asia
country Singapore
Singapore
content_provider SMU Libraries
collection InK@SMU
language English
topic Fine grained
Fine-grained control
Formal security analysis
blockchain
Information Security
spellingShingle Fine grained
Fine-grained control
Formal security analysis
blockchain
Information Security
HOU, Huiying
HAO, Shidi
YUAN, Jiaming
XU, Shengmin
ZHAO, Yunlei
Fine-grained and controllably redactable blockchain with harmful data forced removal
description Notoriously, immutability is one of the most striking properties of blockchains. As the data contained in blockchains may be compelled to redact for personal and legal reasons, immutability needs to be skillfully broken. In most existing redactable blockchains, fine-grained redaction and effective deletion of harmful data are mutually exclusive. To close the gap, we propose a fine-grained and controllably redactable blockchain with harmful data forced removal. In the scheme, the originator of the transaction has fine-grained control over who can perform the redaction and which portions of the transaction can be redacted. The redaction transaction is performed after collecting enough votes from miners. All users can provide the index of the block containing the harmful data to receive rewards, which are borne by the malicious user who initially posted the data. Miners can forcibly remove the harmful data based on the index. The malicious user will be blacklisted if the reward is not paid within a period of time, and any transaction about such user will not be performed later. In addition, the scheme supports the redaction of additional data and unexpended transaction output (UTXO) simultaneously. We demonstrate that the scheme is secure and feasible via formal security analysis and proof-of-concept implementation.
format text
author HOU, Huiying
HAO, Shidi
YUAN, Jiaming
XU, Shengmin
ZHAO, Yunlei
author_facet HOU, Huiying
HAO, Shidi
YUAN, Jiaming
XU, Shengmin
ZHAO, Yunlei
author_sort HOU, Huiying
title Fine-grained and controllably redactable blockchain with harmful data forced removal
title_short Fine-grained and controllably redactable blockchain with harmful data forced removal
title_full Fine-grained and controllably redactable blockchain with harmful data forced removal
title_fullStr Fine-grained and controllably redactable blockchain with harmful data forced removal
title_full_unstemmed Fine-grained and controllably redactable blockchain with harmful data forced removal
title_sort fine-grained and controllably redactable blockchain with harmful data forced removal
publisher Institutional Knowledge at Singapore Management University
publishDate 2021
url https://ink.library.smu.edu.sg/sis_research/7563
https://ink.library.smu.edu.sg/context/sis_research/article/8566/viewcontent/3680359_pvoa_cc_by.pdf
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