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Refusal Before Decoding: Detecting and Exploiting Refusal Signals in Intermediate LLM Activations

Collu, Matteo Gioele et al.
arXiv (All) · Papers
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cryptography-and-security
In this paper, we investigate whether refusal behavior can be predicted from LLM intermediate activations before decoding using linear probes trained on residual stream activations at each transformer block. We find that refusal is linearly decodable well before the final layer, indicating that safe
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