Zhen Ling received the BS degree in computer science from the Nanjing Institute of Technology, China, in 2005, and a PhD degree in computer science from Southeast University, in 2014. He joined the Department of Computer Science at the City University of Hong Kong from 2008 to 2009 as a research associate, and then joined the Department of Computer Science at the University of Victoria from 2011 to 2013 as a visiting scholar. His research interests include network security, privacy, and mobile computing. He loves hacking systems.