Blockchain technology for cybersecurity research explores how decentralized, tamper-proof, and transparent ledger systems can address long-standing challenges in securing digital infrastructures. Research papers in this area highlight blockchain’s role in strengthening authentication, identity management, data integrity, intrusion detection, and access control, making cyber systems more resilient to attacks like data breaches, spoofing, and insider threats. Studies investigate blockchain-based models for secure logging, threat intelligence sharing, and decentralized trust management, reducing reliance on vulnerable centralized authorities. Smart contracts are applied to automate enforcement of security policies, incident response, and compliance monitoring. Researchers also analyze challenges such as scalability, consensus overhead, interoperability with existing cybersecurity frameworks, and privacy preservation. Proposed solutions include lightweight consensus mechanisms, permissioned blockchains, and integration with artificial intelligence for anomaly detection. Overall, this body of research demonstrates how blockchain enhances cybersecurity by enabling distributed, verifiable, and attack-resistant defense mechanisms for critical digital ecosystems.