中文

Journal of Applied Sciences >

2023 , Vol. 41 >Issue 5: 881 - 895

DOI: https://doi.org/10.3969/j.issn.0255-8297.2023.05.013

Computer Science and Applications

Dual Authorization Sharing Scheme of Searchable Electronic Medical Data Based on Consortium Blockchain

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  • 1. The Frontier Information Technology Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, Henan, China;
    2. Henan International Joint Laboratory of Blockchain and Data Sharing, Zhengzhou 450007, Henan, China;
    3. School of Computer Science, Fudan University, Shanghai 201203, China;
    4. Big Data and Artificial Intelligence Institute, Zhengzhou University of Economics and Business, Zhengzhou 450007, Henan, China

Received date: 2021-11-12

  Online published: 2023-09-28

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Abstract

Retrieval of electronic medical record (EMR) in cloud environments induces security problems and patient privacy data leakage problems. To this end, a dual-authorization sharing scheme for EMR that supports on-chain keyword ciphertext retrieval is proposed. In the scheme, original medical data ciphertexts are stored in a cloud, and the information of medical data keyword index is constructed with searchable encryption technology and stored on the blockchain. On the premise of obtaining the hospital retrieval authority, a keyword retrieval algorithm under distributed conditions is used to realize the secure re trieval of the medical data ciphertexts. Based on searchable proxy re-encryption algorithm, an authorization on-chain method for the electronic medical data is proposed, which en sures the access control of patients’ medical data and realizes a double authorization of the shared medical data by the hospital and patients. Finally, random oracle model is used to verify the semantic security of the scheme under the assumption of n-QBDH, and the superiority of the scheme in terms of computational cost is proved by experiments.

Key words： consortium blockchain; medical data security sharing; searchable encryption; proxy re-encryption; dual authorization; access control

Cite this article

MA Xue, PAN Heng, YAO Zhongyuan, SI Xueming . Dual Authorization Sharing Scheme of Searchable Electronic Medical Data Based on Consortium Blockchain[J]. Journal of Applied Sciences, 2023 , 41(5) : 881 -895 . DOI: 10.3969/j.issn.0255-8297.2023.05.013

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