Seungsoo Lee is a PhD student in the Graduate School of Information Security at KAIST working with Dr. Seungwon Shin in Network and System Security (NSS) Laboratory. He received his BS degree in Computer Science from Soongsil University in Korea. He received his MS degree in Information Security from KAIST. His research interests include secure and robust SDN controller, and protecting SDN environments from threats. He is currently leading Project DELTA, which is a penetration testing tool for Software-Defined Networks(SDNs).