Blockchain-Based User-Centric Records Management System

Abstract

Sharing of medical records among institutions can present certain risks to patient's privacy. An exposure of personal medical records causes damage to the finance, etc. Sometimes, it could put patient's life in danger. To achieve secure data sharing between institutions, many studies use cloud storage to store medical records. However, many studies suppose that cloud service providers were trustworthy. These systems required a key establishment with the cloud service providers and all the access logs are governed by cloud service providers. Patients should ask cloud service providers to check these access logs. However, it can be forged by cloud service providers during the request process. In this paper, we propose blockchain based medical records management system for secure data sharing. In order to share securely, we use proxy re-encryption scheme. Also, we use blockchain technology to audit access logs without modification.