A New Identity-Based Encryption Scheme Using Blockchain for Electronic Health System

Subject Areas : Information security

Fatemeh Alidadi Shamsabadi ¹ , Shaghayegh Bakhtiari Chehelcheshmeh ^{2 *} , Majid Alipour ³

1 - Department of Computer, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
2 - Department of Computer, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
3 - Department of Computer, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.

Received: 2023-07-12 Accepted : 2023-09-12 Published : 2023-10-10

Keywords: Electronic Health System, Identity-Based Encryption, Blockchain, Cloud Computing,

Abstract :

With the development of information technology, electronic health (e-health) systems are used as a common approach to recording patients' medical data. Given that medical information is an essential asset of individuals and the health system, there are severe concerns about secure sharing and preserving this information's privacy. In this paper, we propose a new identity-based encryption (IBE) method by bilinear pairings to ensure the confidentiality of patients' data and their privacy in cloud health systems; in this way, this plan also provides authentication for users using challenge-response mechanisms. In addition, the proposed scheme, using blockchain techniques, ensures integrity and precise access control for shared data. The correctness of the proposed protocol is verified, and its security is formally proven in the standard model. The implementation of our scheme is performed in Java, and the results show that the proposed scheme reduces the computational overhead compared to previous similar methods.

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