Zhiyu Ni

University of Southern California

University of Science and Technology of China

Subhajit Dutta Chowdhury^*, Zhiyu Ni^*, Qingyuan Peng, Souvik Kundu, Pierluigi Nuzzo

Accepted by GLFrontiers Workshop, NeurIPS 2023

Subhajit Dutta Chowdhury^*, Zhiyu Ni^*, Qingyuan Peng, Souvik Kundu, Pierluigi Nuzzo

Under review of ICLR 2024

Exploring Robustness of Graph Lottery Tickets Against Adversarial Attacks

• Systematically analyzed the robustness of graph lottery tickets (GLT) against adversarial attacks.
• Proposed a new loss function for training robust yet sparse GLTs against poisoning and evasion attacks.

LLM for Anomaly Detection

• Exploring the capabilities of LLMs (ChatGpt, Llama, etc.) in terms of anomaly detection and encoding graph information into natural language.
• Designing in-context learning flow to enable LLMs to identify fraud and numerically evaluate performance in various datasets (YelpChi, AmazonChi).

Privacy Protector: Defending GNNs Against Inference Attacks

• Explored existing model compression methods as a defense against Inference Attacks on GNN.
• Developing a new training procedure leveraging weights pruning and knowledge distillation.