BLOCKCHAIN-ENABLED PUBLISH-SUBSCRIBE ARCHITECTURE FOR SECURE IoT HEALTHCARE DATA TRANSMISSION
The flexibility of the Internet of Things significantly helps the rapid deployment of health data transfer. IoT peer-to-peer security is not present when transferring health information over conventional Internet protocol, which also consumes more energy. The MQTT protocol is a great choice because of its resource-conserving architecture and lightweight design. Message queue telemetry transfer does not provide any assurances regarding user authentication or the security and integrity of the transmitted data. In this study, real-time secure data transmission with sensor-specific authentication and minimal weight is considered. Publisher and subscriber authentication are mutual. The data provided to the subscriber is verified by a digital signature. The shared key, the user ID, and the received data are all verified using the hash function. Even with the secure transfer of health data from sensors and diagnostic devices via a third-party, such as a broker, trust issues in the medical industry still lead to conflicts. In this case, the transaction hashes for sensor data, disease-diagnosis data, and therapy-related data are transmitted via blockchain technology. This will result in the elimination of centralized, distrustful transactions in favor of brokerless, transparent blockchain transactions.