Tree-ORAP: A Tree-Based Oblivious Random-Access Protocol for Privacy-Protected Blockchain

Lu, Y; Cai, B; Tang, X; Liu, L; Du, J; Yu, S; Atiquzzaman, M; Dustdar, S

Tree-ORAP: A Tree-Based Oblivious Random-Access Protocol for Privacy-Protected Blockchain

Lu, Y Cai, B Tang, X Liu, L Du, J Yu, S

Atiquzzaman, M Dustdar, S

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Publisher:: Institute of Electrical and Electronics Engineers (IEEE)
Publication Type:: Journal Article
Citation:: IEEE Transactions on Services Computing, 2023, PP, (99), pp. 1-13
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Lu, Y
dc.contributor.author	Cai, B
dc.contributor.author	Tang, X
dc.contributor.author	Liu, L
dc.contributor.author	Du, J
dc.contributor.author	Yu, S https://orcid.org/0000-0003-4485-6743
dc.contributor.author	Atiquzzaman, M
dc.contributor.author	Dustdar, S
dc.date.accessioned	2024-03-13T03:29:03Z
dc.date.available	2024-03-13T03:29:03Z
dc.date.issued	2023-01-01
dc.identifier.citation	IEEE Transactions on Services Computing, 2023, PP, (99), pp. 1-13
dc.identifier.issn	2372-0204
dc.identifier.issn	1939-1374
dc.identifier.uri	http://hdl.handle.net/10453/176621
dc.description.abstract	Since the introduction of Bitcoin in 2008, blockchain technology has found widespread applications across various domains. While blockchain offers convenience and immense research value, it also raises privacy and security concerns among users and society at large. Notably, numerous studies have demonstrated the vulnerability of blockchain anonymity. Existing solutions based on bloom filters and SGX(Software Guard Extensions) may safeguard users' access patterns but remain susceptible to novel attacks, including protocol-level and side-channel attacks. To address these issues, we propose a Tree-based Oblivious Random Access Protocol (Tree-ORAP) that not only provides access pattern protection in privacy-preserving blockchain systems but also preserves the original blockchain performance. Furthermore, we design a Tree-ORAP State Version Controller to manage state synchronization across nodes in a multi-client blockchain network. We also analyze the system's security and implement a Tree-ORAP prototype, conducting a series of experiments to demonstrate its efficiency and technical feasibility. In summary, our protocol offers enhanced protection for blockchain systems against a wider range of attacks compared to previous methods, all while maintaining superior security performance and equal or better efficiency.
dc.language	en
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartof	IEEE Transactions on Services Computing
dc.relation.isbasedon	10.1109/TSC.2023.3347589
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0803 Computer Software, 0805 Distributed Computing, 0806 Information Systems
dc.subject.classification	4606 Distributed computing and systems software
dc.subject.classification	4609 Information systems
dc.title	Tree-ORAP: A Tree-Based Oblivious Random-Access Protocol for Privacy-Protected Blockchain
dc.type	Journal Article
utslib.citation.volume	PP
utslib.for	0803 Computer Software
utslib.for	0805 Distributed Computing
utslib.for	0806 Information Systems
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Computer Science
pubs.organisational-group	University of Technology Sydney/Strength - CCSP - Centre for Cyber Security and Privacy
utslib.copyright.status	closed_access	*
dc.date.updated	2024-03-13T03:29:02Z
pubs.issue	99
pubs.publication-status	Published
pubs.volume	PP
utslib.citation.issue	99

Abstract:

Since the introduction of Bitcoin in 2008, blockchain technology has found widespread applications across various domains. While blockchain offers convenience and immense research value, it also raises privacy and security concerns among users and society at large. Notably, numerous studies have demonstrated the vulnerability of blockchain anonymity. Existing solutions based on bloom filters and SGX(Software Guard Extensions) may safeguard users' access patterns but remain susceptible to novel attacks, including protocol-level and side-channel attacks. To address these issues, we propose a Tree-based Oblivious Random Access Protocol (Tree-ORAP) that not only provides access pattern protection in privacy-preserving blockchain systems but also preserves the original blockchain performance. Furthermore, we design a Tree-ORAP State Version Controller to manage state synchronization across nodes in a multi-client blockchain network. We also analyze the system's security and implement a Tree-ORAP prototype, conducting a series of experiments to demonstrate its efficiency and technical feasibility. In summary, our protocol offers enhanced protection for blockchain systems against a wider range of attacks compared to previous methods, all while maintaining superior security performance and equal or better efficiency.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/176621