Blockchain Applications for Dependable and Secure Data Management: A Review

Abstract

Blockchain technology has emerged as one of the most disruptive innovations of the 21st century, redefining how trust, security, and transparency are managed in digital ecosystems. This paper provides a comprehensive review of blockchain applications, challenges, and future directions across multiple domains. It highlights the unique attributes of blockchain, decentralization, immutability, and distributed consensus, which make it a compelling solution for sectors such as finance, healthcare, supply chain management, and governance. While significant progress has been made in leveraging blockchain for secure data sharing, traceability, and process automation, several barriers to widespread adoption remain. Key challenges include scalability limitations, high energy consumption, regulatory uncertainties, interoperability gaps, and vulnerabilities to emerging cyber threats. The review synthesizes current advancements and critically evaluates these issues while identifying potential pathways to overcome them. Future research opportunities are outlined, including the integration of blockchain with emerging technologies such as artificial intelligence, federated learning, and quantum computing; the development of energy-efficient consensus mechanisms; the design of cross-industry blockchain frameworks; and the formulation of robust policies and standards to guide sustainable adoption. The contributions of this review are significant for academia, industry, and policy-making. It not only consolidates diverse perspectives on blockchain innovation but also offers actionable insights for future exploration. Ultimately, blockchain is positioned as a transformative tool whose long-term impact will depend on collaborative efforts to address its challenges and maximize its potential.