The intersection of Blockchain technology and Cyber security has emerged as a key area of study in the field of decentralized environments. This research paper offers a detailed analysis of this intersection to shed light on the intricate dynamics and implications for strong security. After giving a summary of the core concepts of Blockchain technology, such as immutability and decentralization, the paper looks at how it might be used to enhance cyber-security procedures. A review of relevant literature thoroughly examines important topics such as cyber-security applications that use Blockchain technology, security enhancement in decentralized environments, and challenges in integrating Blockchain technology into cyber-security frameworks. The study also looks at future directions and research priorities, illustrating how cyber-security and Blockchain technology will evolve after 2021. By integrating information from multiplesectors.