About Me

I am a final-year Ph.D. student at CISPA Helmholtz Center for Information Security, supervised by Michael Backes. Prior to that, I obtained my bachelor (2018) and master (2021) degrees from University of Science and Technology of China (USTC).

Research Interests

• Agentic RL
• LLM Post-Training & Alignment
• Certifiable Robustness Methods

Publications

• Jailbreaking Attacks vs. Content Safety Filters: How Far Are We in the LLM Safety Arms Race?
  Yuan Xin, Dongping Chen, Lulu Yang, Michael Backes, Xiao Zhang. In ACL 2026 Findings.
• Provably Cost-Sensitive Adversarial Defense via Randomized Smoothing
  Yuan Xin, Dongping Chen, Michael Backes, Xiao Zhang. In ICML 2025.
• Inside the Black Box: Detecting Data Leakage in Pre-trained Language Encoders
  Yuan Xin, Zhengyang Li, Ning Yu, Dongping Chen, Mario Fritz, Michael Backes, Yang Zhang. In ECAI 2024.
• Label Incorporated Graph Neural Networks for Text Classification
  Yuan Xin, Linli Xu, Junliang Guo, Jiquan Li, Xin Sheng, Yuanyuan Zhou. In ICPR 2020.

Research Experience