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20232026
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cs.CL2026

MuPPET: A Benchmark for Contextual Privacy of LLM Assistants in Multi-Party Conversations

Elena Sofia Ruzzetti, Cornelius Emde, Sangdoo Yun +2

LLM agents are increasingly deployed in multi-party environments, handling sensitive personal data on behalf of individual users, for instance in group chats. When such an agent di…

cs.CL2026

Privacy Collapse: Benign Fine-Tuning Can Break Contextual Privacy in Language Models

Anmol Goel, Cornelius Emde, Sangdoo Yun +2

We identify a novel phenomenon in language models: benign fine-tuning of frontier models can lead to privacy collapse. We find that diverse, subtle patterns in training data can de…

cs.CL2025

Dr.LLM: Dynamic Layer Routing in LLMs

Ahmed Heakl, Martin Gubri, Salman Khan +2

Large Language Models (LLMs) process every token through all layers of a transformer stack, causing wasted computation on simple queries and insufficient flexibility for harder one…

cs.CL2025

Leaky Thoughts: Large Reasoning Models Are Not Private Thinkers

Tommaso Green, Martin Gubri, Haritz Puerto +2

We study privacy leakage in the reasoning traces of large reasoning models used as personal agents. Unlike final outputs, reasoning traces are often assumed to be internal and safe…

cs.CL2025

C-SEO Bench: Does Conversational SEO Work?

Haritz Puerto, Martin Gubri, Tommaso Green +2

Large Language Models (LLMs) are transforming search engines into Conversational Search Engines (CSE). Consequently, Search Engine Optimization (SEO) is being shifted into Conversa…

cs.CL2024

Code-Switching Curriculum Learning for Multilingual Transfer in LLMs

Haneul Yoo, Cheonbok Park, Sangdoo Yun +2

Large language models (LLMs) now exhibit near human-level performance in various tasks, but their performance drops drastically after a handful of high-resource languages due to th…