Portrait of Peiran Wang

I’m Peiran Wang (王沛然 in Chinese, you can speak as “Pay-than, Wang”), a CS PhD student in UCLA. I am currently interested in general AI Security (including LLM security, privacy, etc. Especially system security for LLM recently), Machine Learning System (MLSys), usable security, fraud detection and program analysis, etc. I graduated from Sichuan University in Cybersecurity Talented Class in 2022 (18/172). During my undergraduate, I got National Scholarship (3/172), and got GPA of 3.92 (rank 2/172). I’m currently a CS PhD student in UCLA, under the supervision of Prof. Yuan Tian.

Feb 01, 2026 Our lab is selected as one of the 10 teams for Amazon Nova AI Challenge! I serve as one of the team leaders!
Dec 22, 2025 Receive PhD research internship offer from NVIDIA, see you in Santa Clara!
Mar 30, 2025 Got PhD offer from CS@UCLA!
Jan 22, 2025 Finished the research internship in ByteDance.
Oct 19, 2024 Moderator is awarded CCS Distinguished Paper Award at CCS 2024.
Jul 28, 2024 Finished the research internship in Baidu.

Research Interests

Details →
  • AI Agent Security Securing autonomous AI agents against adversarial manipulation, prompt injection, and unintended behaviors in real-world deployments.
  • Interpretable AI Security Leveraging interpretability and explainability techniques to understand, diagnose, and mitigate vulnerabilities in AI systems.
  • Usable Security of AI Designing intuitive security mechanisms and interfaces that help users safely interact with and configure AI systems.
  • AI Misuse Measurement Developing methods to quantify and detect malicious applications of AI, from deepfakes to automated cyber attacks.
  • AI Society Security Investigating the societal impacts of AI security risks, including misinformation, surveillance, and governance challenges.
  • AI for Security Applying AI techniques to strengthen cybersecurity defenses, including threat detection, vulnerability analysis, and automated response.

Selected Publications

Full list →
  1. 2026-Arxiv-PI-SoK.png
    The Landscape of Prompt Injection Threats in LLM Agents: From Taxonomy to Analysis
    Peiran Wang, Xinfeng Li, Chong Xiang, and 5 more authors
    arXiv preprint, 2026
  2. 2025-Arxiv-AgentArmor.png
    AgentArmor: Enforcing Program Analysis on Agent Runtime Trace to Defend Against Prompt Injection
    Peiran Wang, Yang Liu, Yunfei Lu, and 6 more authors
    arXiv preprint, 2025
  3. 2025-Arxiv-DS_Agent_Survey.png
    Large Language Model-based Data Science Agent: A Survey
    Ke Chen, Peiran Wang, Yaoning Yu, and 2 more authors
    Transactions on Machine Learning Research, 2025
  4. 2025-Arxiv-HaluProbe.png
    What Are Models Thinking About? Understanding Large Language Model Hallucinations "Psychology" Through Model Inner State Analysis
    Peiran Wang, Yang Liu, Yunfei Lu, and 2 more authors
    arXiv preprint, 2025
  5. 2024-CCS-Moderator.png
    Moderator: Moderating Text-to-Image Diffusion Models through Fine-grained Context-based Policies
    Peiran Wang, Qiyu Li, Longxuan Yu, and 3 more authors
    In 31st ACM Conference on Computer and Communications Security (CCS), 2024
    🏆 CCS Distinguished Paper Award

Honors & Awards

  • CCS Distinguished Paper Award, ACM. 2024
  • Star of Tomorrow, Microsoft Research Asia. 2022
  • ISCC Best Paper Award, IEEE. 2021
  • National Scholarship, Ministry of Education, China. 2019
  • 1st Level Scholarship, Sichuan University. 2019

Experience

Full CV →
  • Research Intern @ NVIDIA Research Jun 2026 – Sep 2026
  • Research Assistant @ University of California, Los Angeles Sep 2025 – Present
  • Research Intern @ ByteDance Inc. Mar 2025 – Aug 2025
  • Research Intern @ ByteDance Inc. Jul 2024 – Jan 2025
  • Research Intern @ University of Wisconsin-Madison SaFoLab Aug 2024 – Mar 2025
  • Research Intern @ University of Illinois Urbana-Champaign Dream Lab Sep 2024 – Mar 2025
  • Research Intern @ Baidu Inc. May 2024 – Jul 2024
  • Research Intern @ University of California San Diego DataSmith Lab May 2023 – Feb 2024
  • Investment Intern @ Future Capital May 2023 – Aug 2023
  • Research Intern @ Microsoft Research Asia Aug 2021 – Jun 2022
  • Research Assistant @ Sichuan University Beck Lab & CodeSec Lab May 2020 – Jun 2022