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This research introduces PlugAE, a novel method for identifying the origin of black-box large language models using adversarial embeddings and customizable copyright tokens. The study demonstrates that this approach surpasses existing watermarking and fingerprinting techniques in both accuracy and robustness while maintaining stealthiness against detection attempts. These findings are critical for addressing unauthorized model usage and enhancing security protocols within the AI ecosystem.
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The Challenge of Identifying the Origin of Black-Box Large Language Models

arXiv2 min read

arXiv:2503.04332v2 Announce Type: replace-cross Abstract: The tremendous commercial potential of large language models (LLMs) has heightened concerns over their unauthorized use. To address this, we focus on the task of identifying the origin of black-box LLMs. We further propose PlugAE, an effective and efficient identification method that proactively leverages LLM-specific adversarial embeddings and allows users to customize copyright tokens on a targeted query set. Extensive experiments demonstrate that PlugAE outperforms both state-of-the-art model watermarking and fingerprinting methods in accuracy and robustness. We further analyze its stealthiness and reliability from three complementary perspectives and conduct ablation studies under various configurations, confirming its practicality for real-world misuse detection.

Abstract:The tremendous commercial potential of large language models (LLMs) has heightened concerns over their unauthorized use. To address this, we focus on the task of identifying the origin of black-box LLMs. We further propose PlugAE, an effective and efficient identification method that proactively leverages LLM-specific adversarial embeddings and allows users to customize copyright tokens on a targeted query set. Extensive experiments demonstrate that PlugAE outperforms both state-of-the-art model watermarking and fingerprinting methods in accuracy and robustness. We further analyze its stealthiness and reliability from three complementary perspectives and conduct ablation studies under various configurations, confirming its practicality for real-world misuse detection.

Cryptography and Security (cs.CR); Machine Learning (cs.LG)

arXiv:2503.04332 [cs.CR]

(or arXiv:2503.04332v2 [cs.CR] for this version)

https://doi.org/10.48550/arXiv.2503.04332 Focus to learn more arXiv-issued DOI via DataCite

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Full text under the publisher's open licence · 197 words

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