用SAE与线性探针防御VLA对抗补丁

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   arXiv · Robotics

   Detect and Suppress：针对 VLA 模型对抗补丁的机制化防御

   研究用稀疏自编码器（SAE）机制化分析 VLA 表征，识别出与对抗补丁存在强相关的特征，并仅在线性探针检测到攻击时于推理阶段抑制该特征。该方法无需微调 VLA，在 LIBERO-10 上评估显示间歇性干预可提升攻击下成功率，而持续施加同一干预会显著降低策略性能。结果表明攻击相关内部表征可作为 VLA 对抗防御靶点，干预时机对避免干扰正常策略行为至关重要。

Current heat 7·Comparable peak 10（Oct 5）·Comparable change over 24 hours –

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