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A blockchain-based scheme for privacy-preserving and secure sharing of medical data.

Authors
  • Huang, Haiping1, 2
  • Zhu, Peng1, 2
  • Xiao, Fu1, 2
  • Sun, Xiang1, 2
  • Huang, Qinglong1, 2
  • 1 School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu China. , (China)
  • 2 Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210023, Jiangsu China. , (China)
Type
Published Article
Journal
Computers & Security
Publisher
Elsevier
Publication Date
Dec 01, 2020
Volume
99
Pages
102010–102010
Identifiers
DOI: 10.1016/j.cose.2020.102010
PMID: 32895584
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

How to alleviate the contradiction between the patient's privacy and the research or commercial demands of health data has become the challenging problem of intelligent medical system with the exponential increase of medical data. In this paper, a blockchain-based privacy-preserving scheme is proposed, which realizes secure sharing of medical data between several entities involved patients, research institutions and semi-trusted cloud servers. And meanwhile, it achieves the data availability and consistency between patients and research institutions, where zero-knowledge proof is employed to verify whether the patient's medical data meets the specific requirements proposed by research institutions without revealing patients' privacy, and then the proxy re-encryption technology is adopted to ensure that research institutions can decrypt the intermediary ciphertext. In addition, this proposal can execute distributed consensus based on PBFT algorithm for transactions between patients and research institutions according to the prearranged terms. Theoretical analysis shows the proposed scheme can satisfy security and privacy requirements such as confidentiality, integrity and availability, as well as performance evaluation demonstrates it is feasible and efficient in contrast with other typical schemes. © 2020 Elsevier Ltd. All rights reserved.

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