Blockchain Authentication Framework with Byzantine Quorums for Robust Node Verification

Abstract

In response to the growing sophistication of cyber threats, traditional centralized authentication systems have become increasingly vulnerable, particularly to AI-driven attacks and large-scale system compromises. This paper proposes a novel blockchain-based authentication framework that integrates Byzantine Quorums (BQ) to enhance resilience, decentralization, and trust. The framework introduces a dynamic intersection-based verification mechanism, enabling accurate user authentication while continuously detecting and isolating malicious nodes. By leveraging the distributed and immutable nature of blockchain along with quorum-based consensus, the system significantly reduces the risks posed by Sybil, Eclipse, and double-spending attacks. Comparative analysis with existing frameworks demonstrates superior performance in terms of security, efficiency, and malicious node detection. The proposed solution holds strong potential for deployment in critical sectors such as finance, healthcare, and energy, where secure and scalable authentication is essential.