Blockchain for Securing Healthcare Data Transfers in MultiCloud

Abstract

The healthcare industry is experiencing a massive digital transformation characterized by the rapid adoption of cloud computing for storing and processing sensitive patient data. However, as organizations increasingly employ multi-cloud architectures—leveraging services from multiple providers such as AWS, Azure, and Google Cloud—the complexity of data management and security escalates dramatically. Sensitive data is fragmented across distributed systems, raising the risks of unauthorized access, data breaches, and compliance violations under frameworks like HIPAA (Health Insurance Portability and Accountability Act) and GDPR (General Data Protection Regulation). This manuscript explores Date of Publication: 26-05-2026 the application of blockchain technology as a decentralized trust mechanism for securing healthcare data transfers in multi-cloud environments. The research investigates how blockchain’s immutability, distributed ledger transparency, and cryptographic integrity can enhance confidentiality, authentication, and traceability in healthcare data exchanges. The study synthesizes academic literature and real-world use cases to demonstrate that blockchain-enabled architectures can ensure secure interoperability, tamper-proof audit trails, and consent-driven data sharing between heterogeneous cloud ecosystems. Through a mixed-method approach integrating literature review, simulationmodeling, and comparative evaluation, this paper establishes that blockchain significantly reduces the probability of data tampering and unauthorized access by over 60% compared to traditional encryption-based multi-cloud systems. The findings highlight the transformative role of blockchain in enabling trustless collaboration among healthcare stakeholders while ensuring regulatory compliance, patient privacy, and operational efficiency.