Yan-Li Chen

Beyond QA Matching: Perturbation-Response Fingerprinting via Probability Distributions for Large Language Models

Large language models are often instruction-tuned, specialized, quantized, or otherwise transformed, making fine-grained provenance difficult. In this paper, we introduce BReF, a training-free fingerprint that compares how probability distributions over four answer-option labels A/B/C/D move under controlled textual pe...