Abstract
Electronic medical records (EMR) have been commonly used in medical institutions in recent years. In particular, the combination of EMR and the cloud server has significantly improved the work efficiency and therapeutic level of the hospital. It also raises some security concerns, e.g., the information leaks. Blockchain has features including decentralization, traceability, openness, and tamper resistance. Therefore, the technology may be used to overcome the above flaws. In this paper, we introduce a new blockchain-assisted EMR in the cloud environment by using proxy reencryption and sequential multisignature. Firstly, blockchain makes the scheme have high-security performance without a trusty center. Secondly, we use proxy reencryption to protect personal medical data while helping doctors to access patients’ historical medical records. Moreover, the doctors have used a sequential multisignature, which is practical and can effectively improve security performance. The analysis results show that the proposed scheme can satisfy various security features of EMR and has an ideal computational and communication cost. Finally, the scheme is implemented to show its performance.
Highlights
With the full application of modern information technologies such as big data, cloud computing, and artificial intelligence in the medical field, medical informatization has exerted a significant influence on the optimal allocation of medical resources [1, 2]
We propose a blockchain-assisted Electronic medical records (EMR) in the cloud environment by using proxy reencryption and sequential multisignature. e proposed scheme can realize the safe storage of data and make secure data sharing between doctors at different hospitals
We proposed a blockchain-based EMR in the cloud environment
Summary
With the full application of modern information technologies such as big data, cloud computing, and artificial intelligence in the medical field, medical informatization has exerted a significant influence on the optimal allocation of medical resources [1, 2]. EMR has emerged from this context, and it uses electronic devices (such as computers and smartphones) to store, manage, and transmit digitized medical records [3] It can significantly enhance the work efficiency and therapeutic level of the hospital [4]. Ey move medical data from the traditional data center to a cheaper and safer cloud server It can improve work efficiency and allow hospitals to invest more time and resources in diagnosis and care. We propose a blockchain-assisted EMR in the cloud environment by using proxy reencryption and sequential multisignature, and we call it BC-EMR. E main contributions are listed as follows: We establish a group key between a hospital’s server and the doctors of one team utilizing a lightweight oneto-many authentication protocol
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