About Me

I’m a 4-year PhD student in computer science at the Zhejiang University, advised by Prof. Xiaohu Yang and Prof. Jian Liu. I work closely with Prof. Tianwei Zhang and Prof. Ruoxi Jia. Before that, I received my Bachelor’s degree at Zhejiang University in 2022.

My research interest includes Trustworthy AI, Blockchain, and Applied Cryptography. I am always open to collaborations. If you share similar interests, please feel free to email me!

📝 Selected Publications

( * indicates equal contribution.)

ICLR'26 Safety at One Shot: Patching Fine-Tuned LLMs with A Single Instance｜ Paper | Code

Jiawen Zhang, Lipeng He, Kejia Chen, Jian Lou, Jian Liu, Xiaohu Yang, Ruoxi Jia

USENIX Sec'25 Activation Approximations Can Incur Safety Vulnerabilities in Aligned LLMs｜ Paper | Code

Jiawen Zhang*, Kejia Chen*, Lipeng He*, Jian Lou, Dan Li, Zunlei Feng, Mingli Song, Jian Liu, Kui Ren, Xiaohu Yang

NDSS'25 Secure Transformer Inference Made Non-interactive ｜ Paper | Code

Jiawen Zhang, Xinpeng Yang, Lipeng He, Kejia Chen, Wen-jie Lu, Yinghao Wang, Xiaoyang Hou, Jian Liu, Kui Ren, Xiaohu Yang

ICML'25 Assessing Safety Risks and Quantization-aware Safety Patching for Quantized Large Language Models ｜ Paper

Kejia Chen*, Jiawen Zhang*, Jiacong Hu, Yu Wang, Mingli Song, Jian Lou, Zunlei Feng

ECAI'24 SecPE: Secure Prompt Ensembling for Private and Robust Large Language Model ｜ Paper | Code

Jiawen Zhang*, Kejia Chen*, Zunlei Feng, Mingli Song, Jian Lou, Jian Liu, Xiaohu Yang

📖 Educations

2022 - now, Zhejiang University, College of Computer Science and Technology, Ph.D. candidate.
2018 - 2022, Zhejiang University, College of Computer Science and Technology, Bachelor.

💻 Experience

2025.12 - now, Nanyang Technological University, Visiting Scholar, Singapore
2021.09 - 2022.06, Hyperchain, Blockchain Development Engineer, Hangzhou
2021.05 - 2021.09, Meituan, Software Engineer, Shanghai