The Internet of Things is a powerful combination of wireless devices, radio-frequency identification, and numerous sensors that offer the challenging but powerful potential of shaping current systems with the aim of making them smarter. IoT has many different areas of application; one such area is healthcare. The health sector is another promising area for IoT, and several businesses are exploring its application in this sector. In this study, it is proposed to collect healthcare data through the IoT and store it in the Interplanetary File System using Ethereum-based blockchain technology for data security. Blockchain technology is used in IoT to ensure safety of collected data. Smart contracts are used to automatically execute, control, and record events following the terms contained in them, enhancing the characteristics already present in the blockchain. IoT-based healthcare solutions are tested on many blockchain networks. A file was used five times on both a distributed database hosted on IPFS, and a centralized database hosted on Firebase, and the times at which it was uploaded and downloaded were recorded. The method suggested addresses the scalability issue of existing approaches using public blockchain while still satisfying the data security requirements for data storage in IPFS utilizing encryption.

Internet of Things, Blockchain, Healthcare sector, Data security, Interplanetary File System