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Author

Zhuqing Liu

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Jul 2026

Beware What You Autocomplete: Forensic Attribution of Backdoored Code Completions

Extensive evaluations across three representative vulnerability cases and ten backdoor attacks, along with sixteen competitive baselines, demonstrate that CodeTracer consistently achieves high forensic accuracy, low false identification rates, and strong robustness against adaptive attacks.

Anjun Gao, Yueyang Quan, Zhuqing Liu et al. · 2 citations
Preprint Aug 2026

NeuronGuard: Robust LLM Safety Alignment via Ablation-Aware Safety Signal Redistribution

A fine-tuning-stage defense that simultaneously hardens LLMs against both attack classes by redistributing safety signals across a broader set of neurons, and provides a formal guarantee that NeuronGuard strictly reduces the attack success rate (ASR) upper bound.

Anjun Gao, Yueyang Quan, Yu Xia et al. · 2 citations
Preprint Jul 2026

Who Broke the System? Failure Localization in LLM-Based Multi-Agent Systems

Experimental results show that AgentLocate consistently outperforms existing failure localization methods in identifying both responsible agents and failure steps, while remaining efficient in terms of token usage and running time.

Yu Xia, Anjun Gao, Yueyang Quan et al. · 0 citations

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