Abstract
The Internet of Medical Things (IoMT) offers an infrastructure made of smart medical equipment and software applications for healthcare services. Through the internet, the IoMT is capable of providing remote medical diagnosis and timely health services. The patients can use their smart devices to create, store and share their electronic health records (EHR) with a variety of medical personnel including medical doctors and nurses. However, unless the underlying commination within IoMT is secured, malicious users can intercept, modify and even delete the sensitive EHR data of patients. Patients also lose full control of their EHR since most healthcare services within IoMT are constructed under a centralized platform outsourced in the cloud. Therefore, it is appealing to design a decentralized, auditable and secure EHR system that guarantees absolute access control for the patients while ensuring privacy and security. Using the features of blockchain including decentralization, auditability and immutability, we propose a secure EHR framework which is mainly maintained by the medical centers. In this framework, the patients’ EHR data are encrypted and stored in the servers of medical institutions while the corresponding hash values are kept on the blockchain. We make use of security primitives to offer authentication, integrity and confidentiality of EHR data while access control and immutability is guaranteed by the blockchain technology. The security analysis and performance evaluation of the proposed framework confirms its efficiency.
Highlights
The Internet of Medical Things (IoMT) is an extension of Internet of Things (IoT) which combines medical equipment, medical services and medical applications to offer efficient and secure transmission of electronic health records (EHR) within a healthcare system [1]
Using the features of blockchain including decentralization, auditability and immutability, we propose a secure EHR framework which is mainly maintained by the medical centers
The EHR data, which are exchanged through the smart devices, can be very beneficial to medical personnel located in remote locations
Summary
The Internet of Medical Things (IoMT) is an extension of Internet of Things (IoT) which combines medical equipment, medical services and medical applications to offer efficient and secure transmission of electronic health records (EHR) within a healthcare system [1]. Consensus mechanism within the system is used for the audit of the medical treatment process [8].There is a number of schemes that applied blockchain in EHRs system with the purpose of providing efficient data sharing of health records beside the data confidentiality, integrity and access control [9]. These systems suffer from weak privacy preservation which a potential attacker can use to obtain sensitive information such as the preference of certain medical doctor by a number of users due to the public transaction information.
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