Abstract
In the traditional electronic health record (EHR) management system, each medical service center manages their own health records, respectively, which are difficult to share on the different medical platforms. Recently, blockchain technology is one of the popular alternatives to enable medical service centers based on different platforms to share EHRs. However, it is hard to store whole EHR data in blockchain because of the size and the price of blockchain. To resolve this problem, cloud computing is considered as a promising solution. Cloud computing offers advantageous properties such as storage availability and scalability. Unfortunately, the EHR system with cloud computing can be vulnerable to various attacks because the sensitive data is sent over a public channel. We propose the secure protocol for cloud-assisted EHR system using blockchain. In the proposed scheme, blockchain technology is used to provide data integrity and access control using log transactions and the cloud server stores and manages the patient’s EHRs to provide secure storage resources. We use an elliptic curve cryptosystems (ECC) to provide secure health data sharing with cloud computing. We demonstrate that the proposed EHR system can prevent various attacks by using informal security analysis and automated validation of internet security protocols and applications (AVISPA) simulation. Furthermore, we prove that the proposed EHR system provides secure mutual authentication using BAN logic analysis. We then compare the computation overhead, communication overhead, and security properties with existing schemes. Consequently, the proposed EHR system is suitable for the practical healthcare system considering security and efficiency.
Highlights
As patient healthcare records have been developed from traditional paper management to electronic record management, they can be safely stored and accessed and authorized only by legitimate medical centers [1]
We proposed the secure protocol for cloud-assisted electronic health record (EHR) system using blockchain to resolve these problems
We proved that the proposed scheme prevents various attacks and provides secure mutual authentication, anonymity, and perfect forward secrecy
Summary
As patient healthcare records have been developed from traditional paper management to electronic record management, they can be safely stored and accessed and authorized only by legitimate medical centers [1]. The cloud-based EHR system can be vulnerable to potential attacks because the sensitive data is sent over a public channel To resolve these security problems, the cloud-based EHR systems require a secure and efficient protocol. E-health record system using blockchain to provide integrity and decentralization for the EHR sharing and health diagnosis These cloud-assisted EHR systems using blockchain [17,18] do not address a secure protocol for registration, authentication, transaction uploading, and so on. We propose the secure protocol for cloud-assisted EHR system using blockchain to guarantee security, integrity, and decentralization for EHR sharing and health diagnosis. In the proposed EHR system, blockchain technology is used to efficiently provide data integrity and access control using log transactions. The proposed EHR system provides secure health data sharing in a public channel using ECC
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