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Author

Yuchen Xia

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DASH-OPD: Discrepancy-Aware Switching with Hysteresis for On-Policy Distillation

DASH-OPD (Discrepancy-Aware Switching with Hysteresis for OPD) is proposed, the first agentic OPD method to perform adaptive, bidirectional executor switching and introduces hysteresis that prevents rapid switching triggered by transient discrepancy fluctuations.

Yuchen Xia, Qianguo Sun, Chao Song et al. · 2 citations
Preprint Aug 2026

Caliber: Cross-Architecture Extraction-Cost Control for Score-Returning APIs

We present Caliber, an output-perturbation defense against model extraction that formulates noise selection as a calibration problem: how much the defense degrades the supervision signal used to train a surrogate, and the provable per-input query cost of recovering the clean logits. To defend against an attacker that u...

Chi Wang, Hanwen Wang, Yuchen Xia et al. · 0 citations

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