I am a senior undergraduate student at Tsinghua University majoring in Electronic Engineering. My research focuses on AI security, particularly developing robust defenses against emerging threats to AI systems. I am broadly interested in safety and security topics, including hallucination, interpretability, copyright protection, and reliable reasoning.

During Summer 2025, I worked at UC Berkeley with Prof. David Wagner and PhD student Sizhe Chen on defenses against prompt injection attacks. This work led to publications at SaTML 2026 and AISec@CCS 2025.

Prior to that, I was fortunate to work at UIUC with Prof. Gang Wang on leveraging LLM-based agents for explainable phishing detection, leading to a publication at SOUPS 2025.

I am applying to PhD programs for Fall 2026. Feel free to reach out via email for collaboration or opportunities!

Education

BEng in Electronic Engineering
Tsinghua University, Beijing, China
Sep. 2021 - Jun. 2026 (Expected)
Undergraduate Exchange in Computer Science
University of British Columbia (UBC), Vancouver, Canada
Sep. 2023 - Dec. 2023

Research Experience

Research Assistant - LLM Security
University of California Berkeley, CA, USA
June. 2025 - Sep. 2025
Advisor: Prof. David Wagner and PhD student Sizhe Chen (Prompt Injection Defense)
Research Assistant - AI4Security
University of Illinois Urbana-Champaign (UIUC), IL, USA
Jul. 2024 - Jan. 2025
Advisor: Prof. Gang Wang (Phishing Detection & LLM Agents)

Publications

Defending Against Prompt Injection With DataFilter
Yizhu Wang, Sizhe Chen, Raghad Alkhudair, Basel Alomair, David Wagner.
IEEE Conference on Secure and Trustworthy Machine Learning (SaTML), 2026
Defending Against Prompt Injection With a Few DefensiveTokens
Sizhe Chen, Yizhu Wang, Nicholas Carlini, Chawin Sitawarin, David Wagner.
Spotlight ACM Workshop on Artificial Intelligence and Security (AISec @ CCS), 2025
Also appeared on ICML Workshop on Reliable and Responsible Foundation Models (R2-FM@ICML), 2025
Can You Walk Me Through It? Explainable SMS Phishing Detection using LLM-based Agents
Yizhu Wang, Haoyu Zhai, Chenkai Wang, Qingying Hao, Nick A. Cohen, Roopa Foulger, Jonathan A. Handler, Gang Wang.
Proceedings of the 21st Symposium on Usable Privacy and Security (SOUPS), 2025

Awards and Honors

Outstanding Overseas Study Scholarship Award (Top 1/11)
Tsinghua University
Oct, 2025
Outstanding Technological Innovation (5%)
Tsinghua University
Oct, 2025
USENIX student travel grant
USENIX
Aug, 2025
Tsinghua University Zheng Gang Alumni Scholarship (5%)
Tsinghua University, Beijing
Dec. 2023
Excellent Science and Technology Association Backbone (5%)
Tsinghua University, Beijing
Oct. 2023
Social Work Excellence Award (<4%)
Tsinghua University, Beijing
Nov. 2022
Freshman Scholarship (<4%)
Tsinghua University, Beijing
Dec. 2021

Beyond Work