Welcome to My Homepage

👨‍💻 About Me

Pinji Chen is a Ph.D. student in the Institute for Network Sciences and Cyberspace at Tsinghua University. He works in the Network and Information Security (NISL) Lab, advised by Prof. Jianjun Chen and Haixin Duan.

His research interests include protocol security, web security, and AI security. He is particularly interested in exploring emerging technologies and identifying & mitigating their vulnerabilities. His research has been published at major security conferences, including USENIX Security 2024, NDSS 2025, Black Hat USA 2025, and S&P2026.

🎓 Education

• Sep 2024 – Present
  Ph.D. Student, Tsinghua University

• Sep 2020 – Jun 2024
  B.E., Wuhan University

🏆 Selected Awards and Honors

• First-Class Scholarship, Tsinghua University, 2025
• Top Ten Outstanding Youth (10 students across the university), Wuhan University , 2024
• Person of the Year (Model Luojia, 10 undergraduates across the university), Wuhan University, 2024
• National Scholarship (Top 1%), Ministry of Education of China, 2023
• Lei Jun Scholarship (Top 1%), Wuhan University, 2022
• First-Class Scholarship (Top 5%), Wuhan University, three times (2021,2022,2023)

🏓 Extracurricular Achievements

National First-Class Athlete in Table Tennis (China)

• 2025 — 🥇Champion, Ma Yuehan Cup (Team), Tsinghua University
• 2020 — 🥈Runner-up, Men’s Team & Mixed Doubles, Hubei Provincial University Table Tennis Championship
• 2018 — 5th Place, Men’s Singles, National High School Table Tennis Championship
• 2018 — 🥇Champion (Team) & 🥈Runner-up (Singles), Hubei Provincial High School Table Tennis Championship
• 2017 — 🥇Champion, Men’s Singles, Beijing Middle School Table Tennis Championship
• 2014 — 🥇Champion, Men’s Singles, Beijing Primary School Table Tennis Championship
• 2013 — 🥇Champion (Team) & 🥈Runner-up (Singles), China Youth Innovation Cup Table Tennis Championship
• 2013 — 🥈Runner-up, Men’s Singles, Beijing Primary School Table Tennis Championship
• 2012 — 🥇Champion, Men’s Singles, Beijing Primary School Table Tennis Championship

📰 News

• Mar 2026 - Our work: LLMThief: Evaluating Configuration Leaking Risks in Commercial LLM App Stores is accepted by S&P 2026 🎉🎉🎉 [To appear]

• Aug 2025 - Our work: Identifying Logical Vulnerabilities in QUIC Implementations is accepted by NDSS 2026 🎉🎉🎉 [Link]

• Aug 2025 — Honored to be a Briefings Speaker at Black Hat USA 2025 🎉🎉🎉 Awesome experience in Las Vegas! Incredible event 👍👍👍 [Link]

• July 2025 — Our work: The Danger of Packet Length Leakage: Off-path TCP/IP Hijacking Attacks Against Wireless and Mobile Networks appeared at EuroS&P 2025 🎉🎉🎉 [Link]

• Feb 2025 — Our work: Cross-Origin Web Attacks via HTTP/2 Server Push and Signed HTTP Exchange appeared at NDSS 2025 🎉🎉🎉 [Link]

• Aug 2024 — Our work: More Simplicity for Trainers, More Opportunity for Attackers: Black-Box Attacks on Speaker Recognition Systems by Inferring Feature Extractor appeared at USENIX Security 2024 🎉🎉🎉 [Link]