Abstract

Electronic Medical Records (EMRs) play a crucial role in patient care, physician diagnoses, and the advancement of healthcare technology. Researchers have been studying the use of a distributed medical blockchain (BC) system to address the issue of isolated data within centralized healthcare service platforms. Many significant problems persist, including protecting patients' private details, exchanging data across different institutions, and enhancing medical services and effectiveness. This study presents a Blockchain-based Healthcare Privacy Protection Model (BC-HCPPM) for maintaining anonymity in a medical BC system. Initially, the research used an integrated encoder to secure the original EMRs cryptographically. This obscures the confidential data in EMRs to safeguard the patient's privacy and security. A lightweight message-sharing strategy with a (t, n)-threshold is introduced. The EMRs are correlated with a set of n distinct abbreviated portions and are rebuilt using a minimum of t portions. The stored EMR shares use their indexes to create interconnected blocks, forming a BC. To get an EMR from the BC nodes, approved data consumers or institutions must request at least t copies of the EMR. Thus, the medical BC technology streamlines the sharing procedure between institutions and provides adequate safeguards for EMRs. The simulation findings demonstrate that the suggested scheme surpasses comparable literature regarding power usage and storing space efficiency. The medical BC system exhibits excellent stability by implementing the proposed message-sharing method.