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The Patient Medical Health Records (PMHR) have always provided a large amount of research data to medical institutions, and pharmaceutical companies and have contributed to the development in medical research. Lack of confidentiality and integrity produces many security problems with sensitive health information and has a significant negative effect on a patient's life. Therefore, securing medical records is much-needed task for the healthcare system. However, the attack's harmfulness, data vastness and complexity have made data protection a complicated mission. Today's healthcare sector use centralized system to record and manage patient data. These may be less secure and subject to misinformation. Therefore, proper and secure management of patient health records is an important task in entire healthcare field. This include secure storing of health records, sharing among various healthcare professionals. In order to overcome the issues regarding the centralized system, various blockchain enabled approaches have been utilized and most of them could result in enhanced confidentiality, high throughput, low processing time, better access management and finally reduced computational overhead. However, still we need more improvements in assessing and addressing the scalability issues considering the increasing volume of data and the growing number of participants in the healthcare ecosystem. Main contribution of this paper is to review the blockchain enabled techniques in securing patient health records and discuss their underlying mechanisms in order to improve confidentiality, security, throughput, processing time and providing effective access control mechanisms. Finally will conclude with realizing a gap for utilizing methodologies for overcoming scalability issues.
Mahmood et al. (Thu,) studied this question.