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Xiaoxiao Chi

3 accepted papers

2026

Reference Recommendation Based Membership Inference Attack Against Hybrid-Based Recommender Systems

AAAI 2026technical

Recommender systems have been widely deployed across various domains such as e-commerce and social media, and intelligently suggest items like products and potential friends to users based on their preferences and interaction history, which are often privacy-sensitive. Recent studies have revealed t

Cited by 0SourcePDFScholar
2026

Subspace-Aware Graph Construction and Contrastive Alignment for Multimodal Recommendation with Large Language Models

AAAI 2026technical

Multimedia content offers additional context for recommender systems to better understand user interests. Existing studies on multimodal recommendation primarily focus on constructing item-item semantic graphs. However, most of these methods capture only shallow semantic structures based on feature

Cited by 0SourcePDFScholar
2024

Shadow-Free Membership Inference Attacks: Recommender Systems Are More Vulnerable Than You Thought

IJCAI 2024poster

Recommender systems have been successfully applied in many applications. Nonetheless, recent studies demonstrate that recommender systems are vulnerable to membership inference attacks (MIAs), leading to the leakage of users’ membership privacy. However, existing MIAs relying on shadow training suff…