Zhengchunmin Dai

M.Sc. student · Software Engineering Institute, East China Normal University · Shanghai


I go by intuition. Ask with intuition, answer with intuition. Develop intuition, rely on intuition.


Research

I study LLM and agent security from a sub-model perspective, as outlined in My Backdoor Agenda. I am currently interested in the intersection of security, mechanistic interpretability, and alignment, with a practical focus.

For example,

  1. White- and black-box spoofing of control-token representations and its security implications.
  2. Constructing and evaluating model organisms of hidden scheming in latent reasoning models.
  3. The control geometry of refusal and its apparent asymmetry with acceptance.

PhD & Research Opportunities

I am looking for PhD opportunities starting in Fall 2027, as well as research assistant positions. Please feel free to get in touch.


Writing


Publications

  1. Stateful Agent Backdoors: Constructing Cross-Session Attack Programs
    Zhengchunmin Dai, Jiaxiong Tang, Liantao Wu, Zhibo Wang, Peng Sun, Honglong Chen, Yihao Huang, Zhe Zhao Preprint; under review · arXiv:2605.06158v2 · 2026 · Lead author
  2. Server-Enforced Watermarking in U-Shaped Split Federated Learning
    Zhengchunmin Dai, Jiaxiong Tang, Peng Sun, Honglong Chen, Liantao Wu Preprint · arXiv:2511.14422v2 · 2025; revised 2026 · Lead author
  3. Robust Client-Server Watermarking for Split Federated Learning
    Jiaxiong Tang, Zhengchunmin Dai, Liantao Wu, Peng Sun, Honglong Chen IEEE Internet of Things Journal · 13(17): 40185–40197 · 2026 · Co-first author