Kejia Chen

Kejia Chen

PhD student at ZJU

✨ About Me

I’m currently a Ph.D. student at the Visual Intelligence and Pattern Analysis (VIPA) Lab, Zhejiang University, advised by Prof. Zunlei Feng and Prof. Mingli Song. I also gratefully acknowledge the guidance and support of Prof. Jian Lou in my research journey.

πŸ”¬ Research Interests

  • Trustworthy Generative AI
    Exploring reliability, controllability, and ethical alignment in generative models, with a focus on safety and transparency.

  • Efficient Deep Learning
    Designing lightweight, high-performance neural architectures and training strategies to reduce computational cost without compromising accuracy.

I’ll be sharing research updates and progress here from time to timeβ€”stay tuned!

πŸ“ Publications

Publications

(* indicates equal contribution.)

  • Usenix 2025 Activation Approximations Can Incur Safety Vulnerabilities in Aligned LLMs: Comprehensive Analysis and Defense Model ｜Pdf ｜Code
    Jiawen Zhang*, Kejia Chen*, Lipeng He, Jian Lou, Dan Li, Zunlei Feng, Mingli Song, Kui Ren, Xiaohu Yang
  • ICML 2025 Assessing Safety Risks and Quantization-aware Safety Patching for Quantized Large Language Models Model ｜Pdf ｜Code
    Kejia Chen*, Jiawen Zhang*, Jiacong Hu, Yu Wang, Mingli Song, Jian Lou, Zunlei Feng
  • ECAI 2024 SecPE: Secure Prompt Ensembling for Private and Robust Large Language Model ｜Pdf ｜Code
    Jiawen Zhang*, Kejia Chen*, Zunlei Feng, Mingli Song, Jian Liu, Jian Lou, Xiaohu Yang
  • NDSS 2025 Nexus: Secure Transformer Inference Made Non-interactive ｜Pdf ｜Code
    Jiawen Zhang, Xinpeng Yang, Lipeng He, Kejia Chen, Wen-jie Lu, Yinghao Wang, Xiaoyang Hou, Jian Liu, Kui Ren, Xiaohu Yang
  • NeurIPS 2024 Transformer-Doctor: Diagnosing and Treating Vision Transformers ｜Pdf ｜Code
    Jiacong Hu, Hao Chen, Kejia Chen, Yang Gao, Jingwen Ye, Xingen Wang, Mingli Song, Zunlei Feng
  • BCRA 2024 Private, Atomic, Incentive Mechanism for Federated Learning based on Blockchain ｜Pdf
    Kejia Chen*, Jiawen Zhang*, Xuanming Liu, Zunlei Feng, Xiaohu Yang

πŸ“– Review Services

  • Annual Meeting of the Association for Computational Linguistics (ACL)
  • Conference on Computer Vision and Pattern Recognition (CVPR)
  • International Conference on Computer Vision (ICCV)
  • Conference on Neural Information Processing Systems (NeurIPS)
  • Conference on Empirical Methods in Natural Language Processing (EMNLP)