Abstract Software-Defined Networking (SDN) has revolutionized the field by centralizing network intelligence an‎d management. However, this architecture turns the controller, an‎d especially its logging system, into a single point of failure an‎d a vulnerable target for malicious attacks an‎d data tampering. This weakness severely undermines the auditability an‎d digital forensics capabilities that are critical for network security. To overcome this challenge, this research presents a secure, distributed, an‎d tamper-proof framework based on blockchain technology. The proposed architecture leverages a permissioned blockchain to achieve high performance an‎d access control, an‎d an off-chain storage model to ensure scalability. In this model, only the digital fingerprint (hash) of the logs is recorded on-chain, which, while guaranteeing the integrity an‎d non-repudiation of the records, prevents the uncontrolled growth of the blockchainʹs size. Ultimately, by creating a transparent an‎d trustworthy audit trail, this framework significantly enhances the level of security, accountability, an‎d reliability in software-defined networks, providing a practical solution to one of this architectureʹs most significant security challenges.

10/29/2025 12:00:00 AM

87997

1404/08/08

Block - chain Based Tamper - Proof Logging for SDN Controllers

Software-Defined Networking (SDN) , Blockchain , Secure Logging , Data Integrity , Tamper-Proof , SDN Controller , Digital Forensics