2025

ProxyPrompt: Securing System Prompts against Prompt Extraction Attacks

Zhixiong Zhuang, Maria-Irina Nicolae, Hui-Po Wang, Mario Fritz;

Under review arxiv

Stealix: Model Stealing via Prompt Evolution

Zhixiong Zhuang, Hui-Po Wang, Maria-Irina Nicolae, Mario Fritz;

ICML 2025 arxiv blog

Medical Multimodal Model Stealing Attacks via Adversarial Domain Alignment

Yaling Shen*, Zhixiong Zhuang*(co-first), Kun Yuan, Maria-Irina Nicolae, Nassir Navab, Nicolas Padoy, Mario Fritz;
AAAI 2025 Oral arxiv blog

2024

Stealthy Imitation: Reward-guided Environment-free Policy Stealing

Zhixiong Zhuang, Maria-Irina Nicolae, Mario Fritz;

ICML 2024 arxiv code