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Personalized Author Obfuscation with Large Language Models

2025-05-17 · Mohammad Shokri, Sarah Ita Levitan, Rivka Levitan

In this paper, we investigate the efficacy of large language models (LLMs) in obfuscating authorship by paraphrasing and altering writing styles. Rather than adopting a holistic approach that evaluates performance across the entire dataset, we focus on user-wise performance to analyze how obfuscation effectiveness varies across individual authors. While LLMs are generally effective, we observe a bimodal distribution of efficacy, with performance varying significantly across users. To address this, we propose a personalized prompting method that outperforms standard prompting techniques and partially mitigates the bimodality issue.

📄 PDF Abstract BibTeX arXiv:2505.12090

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