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Are Gradients on Graph Structure Reliable in Gray-box Attacks?. (arXiv:2208.05514v1 [cs.CR])
Aug. 12, 2022, 1:20 a.m. | Zihan Liu, Yun Luo, Lirong Wu, Siyuan Li, Zicheng Liu, Stan Z. Li
cs.CR updates on arXiv.org arxiv.org
Graph edge perturbations are dedicated to damaging the prediction of graph
neural networks by modifying the graph structure. Previous gray-box attackers
employ gradients from the surrogate model to locate the vulnerable edges to
perturb the graph structure. However, unreliability exists in gradients on
graph structures, which is rarely studied by previous works. In this paper, we
discuss and analyze the errors caused by the unreliability of the structural
gradients. These errors arise from rough gradient usage due to the discreteness …
More from arxiv.org / cs.CR updates on arXiv.org
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