Author

Yuxuan Huang

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Preprint Aug 2026

Gradient Immunity: Null-Space Resistance to Malicious Fine-Tuning

A Unidirectional Safety Gate (USG) is proposed, instantiated as a Null Space Cubic Layer together with an Inverse Adapter inserted after the final Transformer layer, suggesting that release-time representation-space blocking can raise the cost of malicious downstream adaptation without requiring downstream cooperation.

Yuxuan Huang, Xingyu Zeng, Tianhang Zheng et al. · 0 citations