Author

Yidan Hu

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Review Sep 2026

Principled Detection of Coordinated Manipulation from Aggregate Distortion and Account Reuse

Coordinated manipulation is collective: plausible accounts can jointly distort ratings, rankings, and engagement. Existing defenses primarily construct evidence from identities, graphs, content, or co-activity. We introduce an aggregate-first evidence layer that treats distortion of a context-level outcome distribution...

Qian Guo, Yidan Hu, Rui Zhang · 0 citations

#artificial intelligence Preprint Sep 2026

RAG-CT: Mitigating Privacy Risks on Retrieval-Augmented Generation Systems via Scanning Prompt Distribution

Retrieval-Augmented Generation (RAG) has emerged as a powerful paradigm for improving the quality of generated contents of Large Language Models (LLMs) by grounding responses in external knowledge, thus reducing hallucinations and factual errors. However, recent studies have highlighted a critical vulnerability: advers...

Xingyu Lyu, Jia-Yi Wang, Jian-Feng He et al. · 0 citations