On the Integration of Blockchain and SDN: Overview, Applications, and Future Perspectives
Anichur Rahman, Antonio Montieri, Dipanjali Kundu, Md. Razaul Karim,, Md. Jahidul Islam, Sara Umme, Alfredo Nascita, Antonio Pescap\`e

TL;DR
This paper provides a comprehensive survey of Blockchain and SDN technologies, their integration for enhanced security and privacy, and discusses current applications, challenges, and future research directions in this emerging area.
Contribution
It is the first survey to analyze the integration of Blockchain and SDN with a focus on security, privacy, and practical utilization scenarios.
Findings
BC and SDN are individually effective in network security.
Integration of BC and SDN enhances security and privacy.
Open challenges include scalability and interoperability.
Abstract
Blockchain (BC) and Software-Defined Networking (SDN) are leading technologies which have recently found applications in several network-related scenarios and have consequently experienced a growing interest in the research community. Indeed, current networks connect a massive number of objects over the Internet and in this complex scenario, to ensure security, privacy, confidentiality, and programmability, the utilization of BC and SDN have been successfully proposed. In this work, we provide a comprehensive survey regarding these two recent research trends and review the related state-of-the-art literature. We first describe the main features of each technology and discuss their most common and used variants. Furthermore, we envision the integration of such technologies to jointly take advantage of these latter efficiently. Indeed, we consider their group-wise utilization -- named…
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Taxonomy
TopicsSoftware-Defined Networks and 5G · Blockchain Technology Applications and Security · IoT and Edge/Fog Computing
