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Lijia Yu

15 accepted papers

2026

BadThink: Triggered Overthinking Attacks on Chain-of-Thought Reasoning in Large Language Models

AAAI 2026technical

Recent advances in Chain-of-Thought (CoT) prompting have substantially improved the reasoning capabilities of large language models (LLMs), but have also introduced their computational efficiency as a new attack surface. In this paper, we propose BadThink, the first backdoor attack designed to delib

Cited by 0SourcePDFScholar
2026

Certifying the Full YOLO Pipeline: A Probabilistic Verification Approach

ICLR 2026poster

Object detection systems are essential in safety-critical applications, but they are vulnerable to object disappearance (OD) threat, in which valid objects become undetected under small input perturbations, creating serious risks. This paper addresses the problem of verifying the robustness of YOLO…

Cited by 0SourceScholar
2025

Generalizability of Neural Networks Minimizing Empirical Risk Based on Expressive Power

ICLR 2025poster

The primary objective of learning methods is generalization. Classic generalization bounds, based on VC-dimension or Rademacher complexity, are uniformly applicable to all networks in the hypothesis space. On the other hand, algorithm-dependent generalization bounds, like stability bounds, address m…

Cited by 0SourcePDFScholar
2025

PowerMLP: An Efficient Version of KAN

AAAI 2025technical

The Kolmogorov-Arnold Network (KAN) is a new network architecture known for its high accuracy in several tasks such as function fitting and PDE solving. The superior expressive capability of KAN arises from the Kolmogorov-Arnold representation theorem and learnable spline functions. However, the com…

2025

SeCon-RAG: A Two-Stage Semantic Filtering and Conflict-Free Framework for Trustworthy RAG

NeurIPS 2025poster

Retrieval-augmented generation (RAG) systems enhance large language models (LLMs) with external knowledge but are vulnerable to corpus poisoning and contamination attacks, which can compromise output integrity. Existing defenses often apply aggressive filtering, leading to unnecessary loss of valuab…

Cited by 0SourceScholar
2024

Generalization Bound and New Algorithm for Clean-Label Backdoor Attack

ICML 2024poster

The generalization bound is a crucial theoretical tool for assessing the generalizability of learning methods and there exist vast literatures on generalizability of normal learning, adversarial learning, and data poisoning. Unlike other data poison attacks, the backdoor attack has the special prope…

2024

Improving Robustness of 3D Point Cloud Recognition from a Fourier Perspective

NeurIPS 2024poster

Although 3D point cloud recognition has achieved substantial progress on standard benchmarks, the typical models are vulnerable to point cloud corruptions, leading to security threats in real-world applications. To improve the corruption robustness, various data augmentation methods have been studie…

Cited by 0SourcePDFScholar
2024

T2VSafetyBench: Evaluating the Safety of Text-to-Video Generative Models

NeurIPS 2024poster

The recent development of Sora leads to a new era in text-to-video (T2V) generation. Along with this comes the rising concern about its safety risks. The generated videos may contain illegal or unethical content, and there is a lack of comprehensive quantitative understanding of their safety, posing…