Incoming Postdoctoral Fellow
Johns Hopkins University, Baltimore, MD
Whiting School of Engineering.
Advisor: Yaxing Yao
Research interests: Human-centered AI governance; AI agents and human oversight; privacy auditing; usable privacy and security; human-AI interaction.
My research studies how AI systems reshape user agency, privacy, and oversight across AI-mediated interactions, agentic workflows, and model training pipelines. I design and evaluate sociotechnical mechanisms for contextual privacy scaffolding, behavioral auditing, and human oversight of LLM-powered agents. My recent work focuses on detecting unauthorized use of protected data in RL fine-tuning, supporting privacy decisions in LLM applications, and evaluating oversight failures in GUI agents.
Johns Hopkins University, Baltimore, MD
Whiting School of Engineering.
Advisor: Yaxing Yao
University of Notre Dame, Notre Dame, IN
Department of Computer Science and Engineering.
Advisors: Toby Jia-Jun Li and Yanfang Ye
Carnegie Mellon University, Pittsburgh, PA
Human-Computer Interaction Institute, School of Computer Science.
Tongji University, Shanghai, China
College of Design and Innovation.
Amazon, Seattle, WA
Research focus: robustness and evaluation of tool-using conversational agents under uncertainty.
Hosts: Vy Nguyen and Ziji Zhang
Google, Sunnyvale, CA
Research focus: privacy auditing for RL fine-tuned LLMs, including behavioral canaries for detecting unauthorized use of protected retrieved contexts in post-training.
Hosts: Dayu Yuan and Peter Kairouz
Max Planck Institute for Security and Privacy, Bochum, Germany
Research focus: literature synthesis and research agenda development on privacy risks, human oversight, and security challenges in LLM-powered GUI agents.
Host: Abraham Mhaidli
Chaoran Chen, Zhiping Zhang, Zeya Chen, Eryue Xu, Yinuo Yang, Ibrahim Khalilov, Simret A Gebreegziabher, Yanfang Ye, Ziang Xiao, Yaxing Yao, Tianshi Li, and Toby Jia-Jun Li
arXiv preprint arXiv:2604.04918
Ningzhi Tang, Chaoran Chen, Gelei Xu, Yiyu Shi, Yu Huang, Collin McMillan, Tao Dong, and Toby Jia-Jun Li
arXiv preprint arXiv:2605.29442
Jiaju Chen, Yuxuan Lu, Jiayi Su, Chaoran Chen, Songlin Xiao, Zheng Zhang, Yun Wang, Yunyao Li, Jian Zhao, Tongshuang Wu, Toby Jia-Jun Li, Dakuo Wang, and Bingsheng Yao
arXiv preprint arXiv:2606.06388
Yue Huang, Yuchen Ma, Jiayi Ye, Wenjie Wang, Zipeng Ling, Xingjian Hu, Yuexing Hao, Zichen Chen, Zhangchen Xu, Yunhong He, Zhengqing Yuan, Yujun Zhou, Kehan Guo, Chaoran Chen, Toby Jia-Jun Li, Stefan Feuerriegel, and Xiangliang Zhang
arXiv preprint arXiv:2605.08503
Chaoran Chen, Zhiping Zhang, Bingcan Guo, Shang Ma, Ibrahim Khalilov, Simret Gebreegziabher, Yanfang Ye, Ziang Xiao, Yaxing Yao, Tianshi Li, and Toby Jia-Jun Li
ACM Transactions on AI Security and Privacy (TAISAP), 2026
Chaoran Chen, Dayu Yuan, and Peter Kairouz
Accepted to the 3rd Conference on Language Modeling (COLM 2026)
Ningzhi Tang*, Chaoran Chen*, Zian Fang, Gelei Xu, Maria Dhakal, Yiyu Shi, Collin McMillan, Yu Huang, and Toby Jia-Jun Li
Accepted to the 41st IEEE/ACM International Conference on Automated Software Engineering (ASE 2026)
Simret Araya Gebreegziabher, Allison E Sproul, Yinuo Yang, Chaoran Chen, Diego Gómez-Zará, and Toby Jia-Jun Li
Accepted to the 39th Annual ACM Symposium on User Interface Software and Technology (UIST 2026)
Jingyu Tang*, Chaoran Chen*, Jiawen Li, Zhiping Zhang, Bingcan Guo, Ibrahim Khalilov, Simret Araya Gebreegziabher, Bingsheng Yao, Dakuo Wang, Yanfang Ye, Tianshi Li, Ziang Xiao, Yaxing Yao, and Toby Jia-Jun Li
Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2026)
Bingsheng Yao, Jiaju Chen, Chaoran Chen, April Wang, Toby Jia-jun Li, and Dakuo Wang
Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2026)
Jiayi Ye, Chaoran Chen, Yue Huang, Yanfang Ye, Toby Jia-Jun Li, and Xiangliang Zhang
Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2026)
🎖️ Best Paper Honorable Mention Award
Simret Araya Gebreegziabher, Yukun Yang, Charles Chiang, Hojun Yoo, Chaoran Chen, Hyo Jin Do, Zahra Ashktorab, Werner Geyer, Diego Gómez-Zará, and Toby Jia-Jun Li
Proceedings of the 31st ACM Conference on Intelligent User Interfaces (IUI 2026)
Chaoran Chen, Bingsheng Yao, Ruishi Zou, Wenyue Hua, Weimin Lyu, Toby Jia-Jun Li, and Dakuo Wang
Findings of the Association for Computational Linguistics (ACL 2025 Findings)
Shang Ma*, Chaoran Chen*, Shao Yang, Shifu Hou, Toby Jia-Jun Li, Xusheng Xiao, Tao Xie, and Yanfang Ye
The Network and Distributed System Security Symposium (NDSS 2025)
Chaoran Chen, Leyang Li, Luke Cao, Yanfang Ye, Tianshi Li, Yaxing Yao, and Toby Jia-Jun Li
Proceedings of the 38th Annual ACM Symposium on User Interface Software and Technology (UIST 2025)
Chaoran Chen, Daodao Zhou, Yanfang Ye, Toby Jia-jun Li, and Yaxing Yao
Proceedings of the 30th ACM Conference on Intelligent User Interfaces (IUI 2025)
Chaoran Chen, Weijun Li, Wenxin Song, Yanfang Ye, Yaxing Yao, and Toby Jia-Jun Li
Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI 2024)
Daniel D Slate, Chaoran Chen, Yaxing Yao, and Toby Jia-Jun Li
CCS 2025 Workshop on Human-Centered AI Privacy and Security
Ibrahim Khalilov, Chaoran Chen, Ziang Xiao, Tianshi Li, Toby Jia-Jun Li, and Yaxing Yao
CCS 2025 Workshop on Human-Centered AI Privacy and Security
Chaoran Chen, Zhiping Zhang, Ibrahim Khalilov, Bingcan Guo, Simret A. Gebreegziabher, Yanfang Ye, Ziang Xiao, Yaxing Yao, Tianshi Li, and Toby Jia-Jun Li
CHI 2025 Workshop on Human-Centered Evaluation and Auditing of Language Models (HEAL)
Chaoran Chen, Bingsheng Yao, Yanfang Ye, Dakuo Wang, and Toby Jia-Jun Li
CHI 2024 Workshop on Human-Centered Evaluation and Auditing of Language Models (HEAL)
Zhongyu Ouyang, Shifu Hou, Shang Ma, Chaoran Chen, Chunhui Zhang, Toby Jia-Jun Li, Xusheng Xiao, Chuxu Zhang, and Yanfang Ye
NeurIPS 2023 Workshop on New Frontiers in Graph Learning (GLFrontiers)
Yukun Yang, Simret Araya Gebreegziabher, Hojun Yoo, Charles Chiang, Chaoran Chen, Annalisa Szymanski, Hyo Jin Do, Zahra Ashktorab, Werner Geyer, Diego Gómez-Zará, and Toby Jia-Jun Li
ACM Conference on Intelligent User Interfaces (IUI 2026), Demos Track
Ibrahim Khalilov, Chaoran Chen, Ziang Xiao, Tianshi Li, Toby Jia-Jun Li, and Yaxing Yao
2026 IEEE/ACM 48th International Conference on Software Engineering (ICSE 2026), Demo Track
Department of Computer Science and Engineering, University of Notre Dame
Department of Computer Science and Engineering, University of Notre Dame
Human-Computer Interaction Institute, Carnegie Mellon University
Human-Computer Interaction Institute, Carnegie Mellon University