The growing adoption of cloud computing has introduced unprecedented scalability and flexibility to digital operations but has also exposed users to heightened cybersecurity threats, including data breaches, unauthorized access, and loss of control over critical information. This paper explores how blockchain technology can serve as a robust solution to these challenges by enhancing trust, transparency, and security in cloud environments. Specifically, the study examines blockchain’s decentralized architecture, cryptographic techniques, and immutability as mechanisms to address core vulnerabilities in traditional cloud systems. The paper reviews various blockchain-based cybersecurity models—such as smart contract-based access control, decentralized identity management, and tamper-proof audit trails—and evaluates their effectiveness in real-world scenarios. Through comparative analysis and recent case studies, the findings demonstrate that blockchain not only strengthens data integrity and user authentication but also reduces reliance on centralized authorities that often-become single points of failure. However, the paper also acknowledges the scalability, energy consumption, and i
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