Abstract:
Smart healthcare now relies on connected medical devices (IoMT) that generate sensitive patient data. Protecting this data-while keeping it accessible to legitimate actors-demands privacy, fine- grained access control, and tamper-proof audit trails. This
thesis presents a decentralized healthcare platform built on Hyperledger Fabric. Encrypted records are stored off-chain in Firebase Realtime Database, while on-chain metadata guarantees integrity and traceability. Role- and Attribute-Based Access Control
combine to give patients sovereign control over their information. The prototype includes
custom chaincode, a Node.js/Express backend, and a React frontend. Under a workload
of 100 transactions per second the network sustained sub-200 ms end-to-end latency and
zero transaction loss, confirming viability for real-time clinical use.
