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This research exposes a critical vulnerability in Large Language Models where over-reliance on security-aligned training data creates new attack vectors via deceptive few-shot learning. The study demonstrates that even advanced models like Deepseek-R1 are highly susceptible to generating harmful outputs when their preference extraction mechanisms are compromised by toxic samples. These findings underscore the necessity of rigorous auditing for security-related data sources during the RLHF and training phases to prevent model overtrust.
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FATS: A Prompt Injection Attack Utilizing Feign Security Agents with Deceptive Few-shots Learning

arXiv2 min read

arXiv:2410.08776v3 Announce Type: replace-cross Abstract: Large Language Models (LLMs) face significant security risks despite their advanced capabilities. While techniques like Reinforcement Learning with Human Feedback (RLHF) improve ethical alignment, excessive exposure to security-related training data may cause LLMs to overtrust such information, creating new vulnerabilities. Investigating this issue, we propose a novel attack method termed FATS (Feign Agent Attack with Toxic-shots). By obfuscating preference extraction, compromising toxicity samples, and inducing malicious behavior, we can effectively mislead LLMs into generating harmful outputs. To evaluate FATS effectiveness, we introduce the FAQuery dataset and conduct experiments on various LLMs. Well-known benchmarks like Advbench were selected to assess the approach. Results demonstrate that mainstream models, including GPT-4.1 (61.6\%) and Deepseek-R1 (99.3\%) are highly susceptible. It underscored the need to rigorously analyze security-related data sources during model training, developing more secure and reliable LLMs.

Abstract:Large Language Models (LLMs) face significant security risks despite their advanced capabilities. While techniques like Reinforcement Learning with Human Feedback (RLHF) improve ethical alignment, excessive exposure to security-related training data may cause LLMs to overtrust such information, creating new vulnerabilities. Investigating this issue, we propose a novel attack method termed FATS (Feign Agent Attack with Toxic-shots). By obfuscating preference extraction, compromising toxicity samples, and inducing malicious behavior, we can effectively mislead LLMs into generating harmful outputs. To evaluate FATS effectiveness, we introduce the FAQuery dataset and conduct experiments on various LLMs. Well-known benchmarks like Advbench were selected to assess the approach. Results demonstrate that mainstream models, including GPT-4.1 (61.6\%) and Deepseek-R1 (99.3\%) are highly susceptible. It underscored the need to rigorously analyze security-related data sources during model training, developing more secure and reliable LLMs.

Cryptography and Security (cs.CR); Artificial Intelligence (cs.AI)

arXiv:2410.08776 [cs.CR]

(or arXiv:2410.08776v3 [cs.CR] for this version)

https://doi.org/10.48550/arXiv.2410.08776 Focus to learn more arXiv-issued DOI via DataCite

https://doi.org/10.1007/978-981-95-7078-2_47 Focus to learn more DOI(s) linking to related resources

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Full text under the publisher's open licence · 240 words

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