Yuchen Zhou Yuchen Zhou is a web security researcher in the Internet Security Research group at Palo Alto Networks. His current research interest covers the web-based threat landscape such as malicious JavaScript analysis, exploit kit detection, malvertising, and browser emulation. Before joining Palo Alto Networks, Yuchen obtained his Ph.D., specializing in security and privacy of web applications and single sign-on systems, from the University of Virginia with Prof. David Evans.