A single injected fake user node can act as a backdoor trigger that boosts many target items into the top-10 lists of nearly all target users in GNN-based recommenders, according to the paper's experiments.
Backdoor attack on propagation-based rumor detectors
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Single-Node Trigger Backdoor Attacks in Graph-Based Recommendation Systems
A single injected fake user node can act as a backdoor trigger that boosts many target items into the top-10 lists of nearly all target users in GNN-based recommenders, according to the paper's experiments.