arXiv Machine Learning

CARD: Closing the Teacher-Student Loop for Adversarial Robustness Distillation

arXiv Computer Vision
Oct 9

Collaboratively Guided Adversarial Robust Distillation with Teacher-Favorable Examples

Collaboratively Guided Adversarial Robust Distillation (CGARD) is a method that transfers robustness from high‑capacity teachers to compact students by jointly optimizing student‑adversarial and teacher‑collaborative examples within the same perturbation neighborhood. The teacher‑collaborative example is constrained so that the teacher’s cross‑entropy loss does not exceed that of the clean input, combining collaborative guidance with adversarial supervision. Experiments on CIFAR‑10 and CIFAR‑100, including white‑box and black‑box evaluations, show consistent robustness improvements over strong adversarial distillation baselines.

By Zhi Li, Haowei Liu, Hongchen Yang, Xiaoxuan Wang, Song Gao, Shaowen Yao, Wei Zhou
arXiv AI
Sep 10

How to Backdoor Image Knowledge Distillation

The paper demonstrates that image knowledge distillation can be backdoored even when the teacher model is clean, by poisoning the distillation dataset with triggered and manipulated images that the teacher already classifies as a target label. The attack, effective at poisoning rates as low as 10%, uses targeted adversarial perturbations and GAN-based class transitions to embed a backdoor into the student model while preserving its performance on clean data. The study highlights that the security of knowledge distillation depends not only on the teacher but also on the integrity of the distillation data.

By Qian Ma, Chen Wu, Prasenjit Mitra, Sencun Zhu
arXiv Computation and Language
Sep 28

Recursive Self-Improvement via On-Policy Distillation for Reasoning

The paper introduces a recursive self-improvement framework for language models that replaces an external teacher with a frozen copy of the student, enabling dynamic co-evolution (DCE) and self-refined concise learning (SRCL). DCE allows the privileged teacher to evolve alongside the student, while SRCL trains on shorter, verified rewrites to reduce verbosity. Experiments show that the combined DCE+SRCL approach outperforms traditional on‑policy self‑distillation across multiple model sizes and math benchmarks, achieving significant accuracy gains and shorter outputs.

By Shangjian Yin, Zehao Zhao, Kavosh Asadi, Rui Liu, Yuchen Lu, Shike Mei, Hang Cui, Luke Simon, Zhouxing Shi, Hamed Firooz