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Jie Zhang

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#artificial intelligence Preprint Sep 2026

Calibrating One-Round Membership Inference with Neighbors

A key observation is that reference models serve only to reveal how an example behaves under models not trained on it, and that querying the target model on nearby samples yields the same information, and that querying the target model on nearby samples yields the same information.

Francesco Rita, Jie Zhang, Florian Tramèr · 0 citations
#artificial intelligence Preprint Sep 2026

Render Before Reading: Visual Rendering as a Prompt Injection Defense

This paper studies the role played by the adversarial data's input modality, and identifies a systematic asymmetry: multimodal LLMs are more likely to follow adversarial instruction when they appear as text than when the same instruction is delivered through a non-textual channel.

Jie Zhang, Andrei Baroian, J. V. van Rijn et al. · 0 citations
2026

Patronus: Safeguarding Text-to-Image Models Against Adversarial Fine-Tuning

Text-to-image (T2I) models can be exploited to produce unsafe images. Existing safety measures, e.g., content moderation or model alignment, can be weakened by adversaries who attempt to restore unsafe generation through model fine-tuning. This paper presents Patronus, a defensive framework that improves T2I models’ re...

Xin-Feng Li, Sheng-Yuan Pang, Jialin Wu et al. · 0 citations

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