Ming-chieh's (Nanika) is Chief Researcher in Team T5 Research. He is a well-known vulnerability researcher, and has been disclosing new vulnerabilities for many years. His major areas of expertise include vulnerability research, exploit techniques, malware detection, and mobile security. He has 10+ years of experience on vulnerability research, especially on Windows platform and malicious document and exploit. He discovered numerous Windows system and document application vulnerabilities, such as Microsoft Office, Adobe PDF, and Flash. In recent years, he started his exploration and discovering problems in Mac OS X. He frequently presents his researches at security conferences, such as Black Hat, HITCON, and Syscan. He and Sung-ting are members of CHROOT security group in Taiwan.