Liu Yan (Dou Goodman), Head of AI security team of Baidu X-Lab, is a technology writer of AI Safety Trilogy. His research interests include AI and network security. He starts the open source project Advbox. Wang Yang is a senior security researcher of Baidu X-Lab. His interests lie in face recognition, adversarial learning, and data mining. He maintains and actively contributes to Advbox project that is an open source toolbox for AI safety. Hao Xin has been engaged in security product development for many years in Baidu. His main research directions include object detection and image classification. Dr. Tao (Lenx) Wei is the head of Baidu X-Lab. Prior to joining Baidu, he was an associate professor at Peking University. His research interests include software analysis and system protection, web trust and privacy, programming languages, and mobile security.