Exploring Blockchain Consensus Algorithms: Theory, Progress, and Security Challenges

Abstract

This study explores blockchain consensus algorithms, emphasizing their theoretical foundations, advancements, and security implications. It begins with an overview of key consensus mechanisms, including Proof of Work (PoW), Proof of Stake (PoS), and Byzantine Fault Tolerance (BFT), and examines their respective strengths and limitations. The study also investigates scalability and feasibility in real-world applications, highlighting innovations that enhance energy efficiency and fault tolerance. Furthermore, the research addresses potential vulnerabilities, such as Sybil attacks and centralization risks, proposing mitigation strategies to ensure robust network security. The findings contribute to the understanding and development of secure, efficient, and scalable blockchain systems, fostering innovation in decentralized technologies.