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Enhancing east-west interface security in heterogeneous SDN via blockchain.

Hamad Alrashede1, Fathy Eassa1, Abdullah Marish Ali1

  • 1Department of Computer Science, Faculty of Computing and Information Technology, King Abdul Aziz University, Jeddah, Saudi Arabia.

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|June 26, 2025
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Summary

This study introduces a blockchain security framework for multi-vendor Software Defined Networking (SDN). It enhances controller security and mitigates threats in heterogeneous environments.

Keywords:
BlockchainDecentralized securityHeterogeneous SDN controllersSDNSDN east-west interfaceSDN network securitySoftware defined networking

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Area of Science:

  • Computer Science
  • Network Security

Background:

  • Heterogeneous Software Defined Networking (SDN) environments integrate diverse vendor controllers, increasing scalability and flexibility.
  • The east-west interface connecting these controllers faces significant security threats in multi-vendor deployments.
  • Existing security solutions are insufficient for heterogeneous SDN due to attack specificity, centralization, or homogeneity.

Purpose of the Study:

  • To propose a novel blockchain-based security framework for heterogeneous SDN environments.
  • To establish a decentralized, robust, and interoperable security layer for distributed SDN controllers.
  • To address security gaps and mitigate threats in multi-vendor SDN inter-controller communication.

Main Methods:

  • Utilized the Ethereum blockchain with customized smart contracts for security functions.
  • Implemented mutual authentication, secure data exchange, and access control among distributed controllers.
  • Developed a decentralized security layer to protect the east-west interface.

Main Results:

  • The framework effectively mitigates Distributed Denial-of-Service (DDoS), Man-in-the-Middle (MitM), false data injection, and unauthorized access.
  • Achieved a stable throughput of approximately 20 transactions per second.
  • Demonstrated an average authentication latency of 28-40 ms.

Conclusions:

  • The proposed blockchain framework enhances security for inter-controller communication in heterogeneous SDN.
  • The solution is practical, scalable, and maintains network performance.
  • Offers a reliable approach for securing real-world multi-vendor SDN deployments.