Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NetFense: Adversarial Defenses against Privacy Attacks on Neural
  Networks for Graph Data   Recent advances in protecting node privacy on graph data and attacking graph
neural networks (GNNs) gain much attention. The eye does not bring these two
essential tasks together yet. Imagine an adversary can utilize the powerful
GNNs to infer users' private labels in a social network. How can we
adversarially defend against such privacy attacks while maintaining the utility
of perturbed graphs? In this work, we propose a novel research task,
adversarial defenses against GNN-based privacy attacks, and present a graph
perturbation-based approach, NetFense, to achieve the goal. NetFense can
simultaneously keep graph data unnoticeability (i.e., having limited changes on
the graph structure), maintain the prediction confidence of targeted label
classification (i.e., preserving data utility), and reduce the prediction
confidence of private label classification (i.e., protecting the privacy of
nodes). Experiments conducted on single- and multiple-target perturbations
using three real graph data exhibit that the perturbed graphs by NetFense can
effectively maintain data utility (i.e., model unnoticeability) on targeted
label classification and significantly decrease the prediction confidence of
private label classification (i.e., privacy protection). Extensive studies also
bring several insights, such as the flexibility of NetFense, preserving local
neighborhoods in data unnoticeability, and better privacy protection for
high-degree nodes.

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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys