Blockchain-based Privacy Preserving Physiological Data Sharing Platform

Wearable devices are now widely used and have greatly influenced the development of precision medicine by providing real-time physiological and behavioral data. This data is crucial for doctors to accurately diagnose diseases, monitor their progression, and improve treatment outcomes. Wearable devices also make personalized health management and prevention programs possible, which is beneficial for chronic disease management. Overall, wearable devices provide more data and technical support for precision medicine, leading to better individualized health management and treatment, and ultimately improving medical outcomes and patients’ quality of life. The current practice requires users to provide a direct identifier for device binding, and the data generated by the device is owned by the manufacturer. As a result, users have limited control over their data, and the manufacturer can identify the user corresponding to the data. It may cause privacy concerns for users. To address this issue, we propose a blockchain-based platform consisting of two distinct blockchains: a Decentralized Identity blockchain and a Physiological Data blockchain. On the Decentralized Identity blockchain, users can register their decentralized identity with the government, which can be utilized in the Physiological Data blockchain for device binding instead of direct identifiers, allowing for de-identified data collection. The platform generates a smart contract for the user on the Physiological Data blockchain, which can only be modified by the user. This ensures that the user maintains complete control over data access control. Our system enhances the privacy, security, and credibility of users’ physiological data, instilling greater confidence in the use of such device