Xiaoyi Chen

I am Xiaoyi Chen, a 4th year Ph.D. candidate in Peking University advised by Zhonghai Wu. Currently I am a joint Ph.D student at CISPA - Helmholtz Center for Information Security, advised by Michael Backes and working with Yang Zhang. Previously, I got my bachelor degree in Chongqing University in 2016 and I graduated from Zhengzhou Foreign Language school, Henan, China in 2012.

My research interests widely spread in the intersection areas of AI and security, including security and privacy of machine learning, and the application of machine learning techniques in security related domains. Specifically, recent days I focus on the attacks and defenses of Machine-Learning-as-a-Service.

Research interests

  • Machine Learning for Cyber Security
  • Attacks and Defenses of Machine-Learning-as-a-Service
  • Privacy Preserving Machine Learning


  • BadNL: Backdoor Attacks Against NLP Models
    Xiaoyi Chen, Ahmed Salem, Michael Backes, Shiqing Ma, Yang Zhang
    Techinical Report


Research Intern

Microsoft Research Asia

Work on a research project about optimization of Microsoft Azure Application Gateway mentored by Yongqiang Xiong

August 2017 - February 2018


Peking University

Doctor of Philosophy
Information Security, Computer Science
2016 - 2021 (expected)

Chongqing University

Information Security, 94.5/100, 2/284
2012 - 2016