CERIAS Weekly Security Seminar - Purdue University

Despite decades of mitigation efforts, SYN flooding attacks continue to increase in frequency and scale, and adaptive adversaries continue to evolve. In this talk, I will briefly introduce some background on the SYN flooding attack, existing defenses via SYN cookies and challenges to scale them to very high line rate (100Gbps+), and then present our latest work SmartCookie (USENIX Security '24). SmartCookie's innovative split-proxy defense design leverages high-speed programmable switches for fast and secure SYN cookie generation and verification, while implementing a server-side agent using eBPF to enable scalability for serving benign traffic. SmartCookie can defend against attack rate up to 130+ million packet per second with no packet loss, while also achieving 2x-6.5x lower end-to-end latency for benign traffic compared to existing switch-based hardware defenses. About the speaker: Xiaoqi Chen recently joined as an assistant professor at the School of Electrical and Computer Engineering, Purdue University. His research focuses on utilizing algorithm design for high-speed network data planes to improve network measurement and telemetry, implement closed-loop optimization for intelligent resource allocation and congestion control, as well as to enable novel approaches for enhancing network security and privacy.