Yosuke Chubachi Yosuke Chubachi is Founder and CEO of Active Defense Institute, Ltd, Japan. He is also a member of nao_sec. His research interests are in system security and collecting cyber threat intelligence from the web. He has spoken at Black Hat Europe 2014, PacSec 2014 and Black Hat Asia 2015. He has been a lecturer at Security Camp (a national human resource development program in information security) since 2011 and a member of the SECCON (SECurity CONtest, the largest CTF organizer in Japan) operation team since 2012.