A Blockchain-Based Decentralized Security Management Model for 5G and SDN Networks

Abstract

The convergence of 5G networks and Software-Defined Networking (SDN) has introduced a new paradigm in secure communication management, yet traditional centralized security frameworks struggle to meet the demands of highly dynamic, device-dense environments. To address issues of scalability, reliability, and transparency, this study proposes a decentralized security architecture grounded in blockchain technology. The research integrates theoretical analysis with system modeling and comparative simulation to evaluate the model’s effectiveness. In the proposed design, the SDN control layer is linked to a blockchain network, enabling decentralized authentication, authorization, and event auditing through smart contracts. Simulation outcomes indicate that blockchain-assisted control enhances identification and verification processes by approximately 25–30%, mitigates single-point-of-failure vulnerabilities, and significantly strengthens system-wide trust. By ensuring immutability, distributed trust, and robust operational security, the model provides a resilient framework for next-generation 5G–SDN infrastructures. The study’s scientific and practical value lies in demonstrating how blockchain can establish a sustainable, transparent, and secure ecosystem for future communication networks.