Reproduce “GARD: Gradient-Guided Adversarial Representation Defense against Backdoors in Multimodal Contrastive Learning Models” on OpenResearch

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About this paper

Yuhong Wang, Yujun Cai, Lei Feng, Songze Li

The authors present GARD, a defense for backdoored CLIP models. It uses global and localized adversarial image probes, then trains representations toward detached clean-image anchors while preserving image-text matching. In ImageNet-1K classification, GARD reports ASR below 1% across six attacks and two visual backbones, with competitive clean accuracy. This result is limited to those evaluations.

Summary by alphaXiv.

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