Authors

Marcus Rohrbach

Publications 2

Preprint Open access

U-Space: Uncovering When and Why Uncertainty Arises in Language Models

Tobias Braun, Nils Loose, Alexander Herzog et al. · 2026

Large language models are informing decisions with ever-higher stakes. As the consequences of their errors grow, a central question becomes harder to ignore: how much can we trust an individual answer? Yet recognizing when to defer remains difficult because language models can present incorrect conclusions with fluent …

Preprint Open access

The Poisoned Conversation: Privacy-Leaking Watermarks in Unified Multimodal Models

Tobias Braun, Jonas Henry Grebe, Emil Sivic et al. · 2026

Multimodal models are increasingly shifting toward unified architectures that understand and generate text, images, and other modalities within a shared conversational context. This design enables fluid interaction across modalities, but it also changes the privacy threat model: Information revealed in one part of a co …

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