Medchain for Securing Data in Decentralized Healthcare System Using Dynamic Smart Contracts

In today's era the current medical application accepts and analyze the patient medical data. Developing a system to acquire data that can "Efficient Data Security System for Storing Medical system data". The medical data are obtained by a user, Lab technician (for X-ray, blood test), and hospital. In the proposed research, security is one of the component in optimization of services using Cyber Physical System. The digital records are accessible only to the authorized persons. This paper consists of a medical application that accepts and analyze a patient's medical data to give a pre-diagnosis to check if he/she is having specific disease, ensuring to efficient data security system to secure the patient's medical data stored and accessed in the cloud. The paper aims to design and develop a Block Chain based Security Model for smart healthcare systems to enable Confidentiality, Integrity, Authentication and Authorization for the medical data.To propose the Dynamic Smart Contract Ledgers (DSMCL) for Confidentiality and Integrity handling Sensitive data of patient and DSMCL for Authentication and Authorization handling medical Images(scan, X-ray). The outcome of this paper is to secure the medical data and image using blockchain and smart contract technology. Only the authorized users will be allowed to access patient detail after validation and verification during emergency situation using Key generation which holds individual patient data inside a block. Finally, the accuracy of the execution is compared with the algorithms not involving blockchain and the proposed system is much better than the conventional ones.