Blockchain Based Security System for Digital Health Records

Abstract

The Trust Revolution in Digital Health (Comprehensive)The total digitization of health care demands a fundamental change in the practice of data management, because the existing Digital Health Records (DHR) systems involve insurmountable tension between the unconditional privacy of patients and the necessity to benefit large-scale medical data utility. Although it has been demonstrated that established decentralized solutions, especially those that are based on the permissioned Hyperledger Fabric (HLF) are effective in ensuring integrity of data and basic Role-Based Access Control (RBAC), they, structurally, fall short of three important, real-life shortcomings: the inherent threat of unlimited unauthorized access, the full traceability of user identities on the unalterable ledger and the ethical stalemate regarding collaborative use of data. This paper presents a very new, integrated DHR architectural design that greatly secures the HLF core by integrating three synergistic, state-of-the-art cryptographic and privacy enhancing pillars: 1) Time-Bound Keys (T-BK) a very innovative mechanism that substitutes current access policy flags with cryptographically enabled and self revoking key mechanism to enforce granular time-sensitive access control. 2) Zero-Knowledge Proofs (ZKP) and Fabrics Transient Fields, which guarantee assured transaction unlinkability and full.