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Explainable federated learning scheme for secure healthcare data sharing

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Abstract

Artificial intelligence has immense potential for applications in smart healthcare. Nowadays, a large amount of medical data collected by wearable or implantable devices has been accumulated in Body Area Networks. Unlocking the value of this data can better explore the applications of artificial intelligence in the smart healthcare field. To utilize these dispersed data, this paper proposes an innovative Federated Learning scheme, focusing on the challenges of explainability and security in smart healthcare. In the proposed scheme, the federated modeling process and explainability analysis are independent of each other. By introducing post-hoc explanation techniques to analyze the global model, the scheme avoids the performance degradation caused by pursuing explainability while understanding the mechanism of the model. In terms of security, firstly, a fair and efficient client private gradient evaluation method is introduced for explainable evaluation of gradient contributions, quantifying client contributions in federated learning and filtering the impact of low-quality data. Secondly, to address the privacy issues of medical health data collected by wireless Body Area Networks, a multi-server model is proposed to solve the secure aggregation problem in federated learning. Furthermore, by employing homomorphic secret sharing and homomorphic hashing techniques, a non-interactive, verifiable secure aggregation protocol is proposed, ensuring that client data privacy is protected and the correctness of the aggregation results is maintained even in the presence of up to t colluding malicious servers. Experimental results demonstrate that the proposed scheme’s explainability is consistent with that of centralized training scenarios and shows competitive performance in terms of security and efficiency.

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Authors and Affiliations

  1. Beijing Academy of Science and Technology, Beijing Computing Center Company Ltd., Beijing, China

    Liutao Zhao & Lin Zhong

  2. School of Intelligent Systems Engineering, Sun Yat-sen University, Shenzhen, China

    Haoran Xie

  3. Hangzhou Innovation Institute of Beihang University, Hangzhou, China

    Yujue Wang

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  1. Liutao Zhao
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  2. Haoran Xie
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  3. Lin Zhong
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  4. Yujue Wang
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Correspondence to Liutao Zhao.

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Zhao, L., Xie, H., Zhong, L. et al. Explainable federated learning scheme for secure healthcare data sharing. Health Inf Sci Syst 12, 49 (2024). https://doi.org/10.1007/s13755-024-00306-6

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