基于联盟链的医疗数据安全共享方案

doi:10.3969/j.issn.0255-8297.2021.01.011

Abstract

Abstract: The existing blockchain-based medical data sharing schemes perform access control without the consideration of time dimension. To solve this problem, this paper proposes a medical data security sharing scheme, based on consortium blockchain in consideration of time dimension to perform access control. Firstly, medical data ciphertext is stored in cloud storage, and the metadata is stored in the consortium blockchain, such that the medical data can be stored and shared safely. Secondly, by combining smart contract with ciphertext-policy attribute-based encryption (CP-ABE), a data security sharing protocol is designed to realize fine-grained access control with time dimension. The security analysis and experimental results show that this scheme could realize fine-grained access control with time dimension, besides ensuring the security of the stored medical data.

Key words: medical consortium blockchain, attribute-based encryption, secure storage, limited time access, smart contract

CLC Number:

TP309.2

ZHOU Zhengqiang, CHEN Yuling, LI Tao, REN Xiaojun, QING Xinyi. Medical Data Security Sharing Scheme Based on Consortium Blockchain[J]. Journal of Applied Sciences, 2021, 39(1): 123-134.

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Medical Data Security Sharing Scheme Based on Consortium Blockchain

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