collaborators

5 papers

cs.AI2026

Agent Skills Matter: Inferring Proprietary Skills from Execution Trajectories

Jianing Geng, Ruiqi He, Zekun Fei +6

Agent skills package reusable procedures that improve downstream performance. Their lightweight, portable form enables marketplace monetization and private deployment behind cloud-…

cs.CR2026

Misrouter: Exploiting Routing Mechanisms for Input-Only Attacks on Mixture-of-Experts LLMs

Zekun Fei, Zihao Wang, Weijie Liu +4

Mixture-of-Experts (MoE) architectures have emerged as a leading paradigm for scaling large language models through sparse, routing-based computation. However, this design introduc…

cs.CR2026

Hiding in Plain Sight: A Steganographic Approach to Stealthy LLM Jailbreaks

Jianing Geng, Biao Yi, Zekun Fei +4

Jailbreak attacks pose a serious threat to Large Language Models (LLMs) by bypassing their safety mechanisms. A truly advanced jailbreak is defined not only by its effectiveness bu…

cs.CL2025

BadReasoner: Planting Tunable Overthinking Backdoors into Large Reasoning Models for Fun or Profit

Biao Yi, Zekun Fei, Jianing Geng +4

Large reasoning models (LRMs) have emerged as a significant advancement in artificial intelligence, representing a specialized class of large language models (LLMs) designed to tac…

cs.CR2025

Your Semantic-Independent Watermark is Fragile: A Semantic Perturbation Attack against EaaS Watermark

Zekun Fei, Biao Yi, Jianing Geng +3

Embedding-as-a-Service (EaaS) has emerged as a successful business pattern but faces significant challenges related to various forms of copyright infringement, particularly, the AP…