Tianyi Xie (Jackyxty) is a senior security researcher and CTF player at KeenLab of Tencent. He is the captain of CTF Team eee and A*0*E. He is the winner of VMware category in Pwn2Own 2017 and baseband category in Mobile Pwn2Own 2017. He is also a member of the "Master of Pwn" winning team in Mobile Pwn2Own 2017.