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Extracting Prompts by Inverting LLM Outputs

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arxiv 2405.15012 v2 pith:ZW263K57 submitted 2024-05-23 cs.CL cs.LG

classification cs.CLcs.LG
keywords output2promptoutputsmodelpromptsextractlanguagequeriesuser
verification ladder T0 review T1 audit T2 compute T3 formal
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We consider the problem of language model inversion: given outputs of a language model, we seek to extract the prompt that generated these outputs. We develop a new black-box method, output2prompt, that learns to extract prompts without access to the model's logits and without adversarial or jailbreaking queries. In contrast to previous work, output2prompt only needs outputs of normal user queries. To improve memory efficiency, output2prompt employs a new sparse encoding techique. We measure the efficacy of output2prompt on a variety of user and system prompts and demonstrate zero-shot transferability across different LLMs.

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Cited by 3 Pith papers

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