Cheng-Da Tsai, also as known as Orange Tsai, is member of DEVCORE and CHROOT from Taiwan. He has spoken at conferences such as Black Hat USA, Black Hat ASIA, DEF CON, HITCON, HITB, CODEBLUE and WooYun. He participates in numerous Capture-the-Flags (CTF), and won 2nd place in DEF CON 22/25 as team member of HITCON. Currently, he is focusing on vulnerability research and web application security. Orange enjoys finding vulnerabilities and participating in Bug Bounty Programs. He is enthusiastic about Remote Code Execution (RCE), and uncovered RCEs in several vendors, such as Facebook, Uber, Apple, GitHub, Amazon, Yahoo and Imgur. Twitter: @orange_8361 Blog: http://blog.orange.tw/