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Qinbo Zhang

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Stealing Split Learning Bottom Models by Recovering Embedding Geometry

VENOM first learns a contrastive space over server-observed embeddings, then builds a neighborhood graph and trains a surrogate bottom model to match targets and respect local geometry via a neighbor-matching loss alongside pointwise and feature-shape alignment to preserve the relational structure that defenses fail to...

Qinbo Zhang, Yanhang Shi, Ziying Zhang et al. · 1 citation
Preprint Aug 2026

Dual-Adversarial Safety Alignment: Cultivating Intrinsic Threat Comprehension in LRMs

Experiments show that with only 1K synthesized samples, AdvSafe-aligned LRMs achieve significantly stronger jailbreak robustness than existing baselines, with almost no utility degradation, demonstrating that learning unsafety knowledge enables a superior robustness-utility trade-off and generalizes beyond seen attack...

Hongli Shen, Shaopeng Fu, Qinbo Zhang et al. · 0 citations

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