2 papers
cs.LG2026
Band Together: Untargeted Adversarial Training with Multimodal Coordination against Evasion-based Promotion Attacks
Guanmeng Xian, Ning Yang, Philip S. Yu
Multimodal recommender systems exploit visual and textual signals to alleviate data sparsity, but this also makes them more vulnerable to evasion-based promotion attacks. Existing…
cs.LG2026
Manifold-Constrained Adversarial Training for Long-Tailed Robustness via Geometric Alignment
Guanmeng Xian, Ning Yang, Philip S. Yu
Adversarial training is effective on balanced datasets, but its robustness degrades under longtailed class distributions, where tail classes suffer high robust error and unstable d…