Zilong Wang

Targeted Counterfactual Fingerprinting for Black-Box LLM Ownership Verification

TCF (Targeted Counterfactual Fingerprinting), a black-box LLM fingerprinting framework that converts open-ended generation comparison into constrained-answer targeted counterfactual transfer, and introduces the source-model counterfactual margin (SCM), a protected-model-only quantity that certifies the target is unlike...