FedEDB: Building a Federated and Encrypted Data Store via Consortium Blockchains

Decentralized storage platforms based on consortium blockchains have emerged in the spotlight of research and industry communities because they are flexible, transparent, and eliminated trust in contrast to the traditional centralized data-sharing model. However, due to wide attacking surfaces in a...

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Bibliographic Details
Published in:IEEE transactions on knowledge and data engineering 2024-11, Vol.36 (11), p.6210-6224
Main Authors: Guo, Yu, Xi, Yuxin, Wang, Haodi, Wang, Mingyue, Wang, Cong, Jia, Xiaohua
Format: Article
Language:English
Subjects:
Blockchain
Blockchains
Cryptography
decentralized applications
Encryption
Indexes
Protocols
searchable encryption
Servers
smart contract
Smart contracts
zero-knowledge proof
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Summary:Decentralized storage platforms based on consortium blockchains have emerged in the spotlight of research and industry communities because they are flexible, transparent, and eliminated trust in contrast to the traditional centralized data-sharing model. However, due to wide attacking surfaces in a blockchain network, this decentralized data-sharing paradigm is subject to malicious data breaches. Untrusted blockchain nodes can directly obtain sensitive information from the query processing and their local storage. Several studies have been made for solving this dilemma, but they only focus on single-user settings and cannot be directly applied to multi-owners blockchain-based data sharing scenarios. In this paper, we introduce FedEDB, a federated and encrypted data store by using consortium blockchains. Unlike existing solutions that focus on single-user settings, our proposed schemes can efficiently support privacy-preserving and reliable multi-owner queries in the decentralized setting. We start from the practical key aggregation technique to construct the multi-owner search schemes and further refine the underling building blocks to enhance the security. Besides, we integrate the smart contract with our tailored zero-knowledge proof to enforce secure and reliable result verification protocol with fairness. We implement a prototype and thorough security analysis and comprehensive evaluation results confirm the practicability of our design.
ISSN:1041-4347
1558-2191
DOI:10.1109/TKDE.2023.3341149