Blockchain-based security framework for mitigating network attacks in multi-SDN controller environment

In the evolving landscape of network management, multi-Software Defined Networking (SDN) controller environments represent a paradigm shift toward more dynamic and flexible network architectures. However, this advancement brings forth complex challenges in maintaining robust access control mechanisms. This paper proposes a novel approach by integrating Ethereum smart contracts and the Proof of Work (PoW) mechanism to address these challenges. Using Blockchain with SDN, Denial of Service (DoS) attacks, spoofing attacks, and authentication attacks are effectively mitigated. We explore the potential of Ethereum blockchain technology, particularly its smart contracts and PoW consensus algorithm, as tools for enhancing access control within multi-SDN environments. The paper presents a comprehensive analysis of how smart contracts can automate and secure access policies, mitigating traditional access control limitations. Additionally, the role of PoW in maintaining the integrity and security of these contracts within a decentralized framework is examined. This study aims to pave the way for future research and practical applications of blockchain in network security, highlighting the transformative potential of combining these cutting-edge technologies in multi-SDN controller environments.