eHealth Integrity Model Based on a Permissioned Blockchain
Tomasz Hyla, Jerzy Pejaś · 2019
Large eHealth systems should have a mechanism to detect unauthorized changes in patient's medical documentation, access permissions, and logs. This is due to the fact, that the modern eHealth systems interconnect many healthcare providers and many healthcare sites. One of the most promising technologies for implementing integrity protection service is blockchain technology. In this paper, we propose Blockchain based eHealth Integrity Model for ensuring integrity of information in eHealth systems that uses a permissioned blockchain with off-chain storage of information. In contrast to existing solutions, our model allows removing of information, which in many countries' eHealth systems is a legal requirement. Moreover, our proposal can be easily integrated using service oriented architecture, which lowers costs and efforts of systems deployment. The paper also discuss several security problems related to blockchains that must be considered during blockchain development in eHealth systems.