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Thibaud Gloaguen

6 accepted papers

2026

Fewer Weights, More Problems: A Practical Attack on LLM Pruning

ICLR 2026poster

Model pruning, i.e., removing a subset of model weights, has become a prominent approach to reducing the memory footprint of large language models (LLMs) during inference. Notably, popular inference engines, such as vLLM, enable users to conveniently prune downloaded models before they are deployed.…

Cited by 0SourcecodeScholar
2026

LLM Fingerprinting via Semantically Conditioned Watermarks

ICLR 2026oral

Most LLM fingerprinting methods teach the model to respond to a few fixed queries with predefined atypical responses (keys). This memorization often does not survive common deployment steps such as finetuning or quantization, and such keys can be easily detected and filtered from LLM responses, ulti…

Cited by 0SourcecodeScholar
2026

Watch your steps: Dormant Adversarial Behaviors that Activate upon LLM Finetuning

ICLR 2026oral

Finetuning open-weight Large Language Models (LLMs) is standard practice for achieving task-specific performance improvements. Until now, finetuning has been regarded as a controlled and secure process in which training on benign datasets leads to predictable behaviors. In this paper, we demonstrate…

Cited by 0SourcecodeScholar
2025

Discovering Spoofing Attempts on Language Model Watermarks

ICML 2025poster

LLM watermarks stand out as a promising way to attribute ownership of LLM-generated text. One threat to watermark credibility comes from spoofing attacks, where an unauthorized third party forges the watermark, enabling it to falsely attribute arbitrary texts to a particular LLM. Despite recent work…