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Tom Sander

8 accepted papers

2026

How Good is Post-Hoc Watermarking With Language Model Rephrasing?

ICML 2026poster

Generation-time text watermarking embeds statistical signals into text for traceability of AI-generated content. We explore post-hoc watermarking where an LLM rewrites existing text while applying generation-time watermarking, to protect copyrighted documents, or detect their use in training or RAG …

Cited by 0SourceScholar
2026

Learning to Watermark in the Latent Space of Generative Models

ICML 2026poster

Existing approaches for watermarking AI-generated images often rely on post-hoc methods applied in pixel space, introducing computational overhead and potential visual artifacts. In this work, we explore latent space watermarking and introduce DistSeal, a unified approach for latent watermarking tha…

Cited by 0SourceScholar
2025

Rethinking the Role of Verbatim Memorization in LLM Privacy

NeurIPS 2025poster

Conventional wisdom in machine learning privacy research states that memorization directly implies a loss of privacy. In contrast, a well-generalized model only remembers distributional patterns and preserves privacy of its training data. In this work, we show that this relationship is much more c…

Cited by 0SourceScholar
2025

Watermark Anything With Localized Messages

ICLR 2025poster

Image watermarking methods are not tailored to handle small watermarked areas. This restricts applications in real-world scenarios where parts of the image may come from different sources or have been edited. We introduce a deep-learning model for localized image watermarking, dubbed the Watermark A…

2024

Differentially Private Representation Learning via Image Captioning

ICML 2024poster

Differentially private (DP) machine learning is considered the gold-standard solution for training a model from sensitive data while still preserving privacy. However, a major barrier to achieving this ideal is its sub-optimal privacy-accuracy trade-off, which is particularly visible in DP represent…

2024

Implicit Bias in Noisy-SGD: With Applications to Differentially Private Training

AISTATS 2024poster

Training Deep Neural Networks (DNNs) with small batches using Stochastic Gradient Descent (SGD) often results in superior test performance compared to larger batches. This implicit bias is attributed to the specific noise structure inherent to SGD. When ensuring Differential Privacy (DP) in DNNs’ tr…

2024

Watermarking Makes Language Models Radioactive

NeurIPS 2024spotlight

We investigate the radioactivity of text generated by large language models (LLM), \ie whether it is possible to detect that such synthetic input was used to train a subsequent LLM. Current methods like membership inference or active IP protection either work only in settings where the suspected tex…