Blockchain is a series of blocks that holds data with digital identities in a distributed and decentralised network. Blockchain technology is utilised by healthcare institutions in addition to financial and social services. Through a variety of cloud service models, cloud computing, one of the network-enabled technologies, has been widely embraced in the sector. Integrating blockchain technology with current cloud systems has significant promise for improving security and privacy as well as functionality and performance. Preserving the integrity of patient data is one of the fundamental issues facing the healthcare industry. Because every patient has unique physical traits, the course of treatment for a common ailment changes depending on the circumstances. Blockchain has the ability to improve patient care and reduce treatment costs by offering a transparent and stable framework for digital health record keeping. In addition to demonstrating how cutting out middlemen can save costs and increase system stability, this paper illustrates how smart contracts can be used to create interoperability in the healthcare system.

Cloud Computing, Block Chain, Data Security, Digital health record.