Last update:
24-Jul-2020

The rapid technological developments of the 21st century and the adoption of Internet 4.0 technologies in all facets of everyday life, has led to the digitization of services even in areas that have traditionally operated without the help of technology. One of the areas that is being modernized due to the abovementioned developments is that of health care. Medical process automation, robotics and medical devices are creating a wealth of digital health data. Each patient's health data is organized and structured in electronic health records (EHR), which are usually stored in the central databases of healthcare providers. Although EHRs offer many possibilities, the centralized data storage makes them vulnerable to malicious attack, and they do not provide interoperability between the systems of different healthcare providers. Blockchain is a technology that provides appropriate solutions and which can eliminate the abovementioned challenges in the healthcare sector. Decentralized data storage and data management by the patients themselves can provide greater security, interoperability and, generally, more efficient health services. The scope of this paper work is to present the challenges in the field of eHealth, to introduce blockchain as a solution for most of these challenges, and to present appropriate methodology that can be used to store medical data in a healthcare application based on blockchain. The methodology presented is already being developed and applied in the context of the Impilo research project, which aims to develop a blockchain-based social networking application in the healthcare domain.

Key words: Blockchain, Electronic health record, GDPR, Interoperability, Medical data, Security.