Cloud-Edge-End Coordination Defense Against DDOS Attacks

Distributed Denial of Service (DDoS) attacks have been rampant for nearly 30 years since their large-scale emergence, posing a major challenge in the field of cybersecurity. This paper designs an inter-domain coordination mechanism based on blockchain and smart contract technologies, utilizing the centralized control features of Software Defined Networking (SDN) architecture to monitor traffic in real time at the source of DDoS attacks. It achieves multiple defense techniques, including access layer anomaly detection and link traffic filtering. It establishes a trustworthy technical guarantee system for the proactive defense of critical information infrastructure.