CoTSRF fingerprints a source LLM by training a contrastive encoder on chain-of-thought responses, then flags suspect APIs whose reasoning-style feature distances are too close to the source's distribution.
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CoTSRF: Utilize Chain of Thought as Stealthy and Robust Fingerprint of Large Language Models
CoTSRF fingerprints a source LLM by training a contrastive encoder on chain-of-thought responses, then flags suspect APIs whose reasoning-style feature distances are too close to the source's distribution.