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Si-Yuan Liang

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#machine learning Preprint Sep 2026

TrojanWorld: Backdooring World-Model Agents via Imagination Steering

To achieve effective, stealthy, and persistent control, TrojanWorld combines Decision-Reflective Induction to steer trigger-conditioned imagination toward attacker-specified actions using decision feedback, Clean Behavior Anchoring to preserve trigger-free predictive and behavioral fidelity, and Causal Propagation to s...

Wen-Kai Huang, Si-Yuan Liang, Gaolei Li et al. · 0 citations
Preprint Aug 2026

SafeCA: Safe Cross-Attention Localization and Regulation for Text-to-Video Jailbreak Defense

Text-to-Video (T2V) generative models are vulnerable to jailbreak attacks in real-world deployment, leading them to produce harmful or inappropriate content. Existing defense approaches mainly rely on input filtering or reconstruction, which not only incur high computational latency but also tend to distort semantics....

Si-Yuan Liang, Yupeng Qiu, Junfeng Fang et al. · 0 citations
Preprint Aug 2026

SoK: Intent-Oriented Systematization of Multi-Turn LLM Jailbreaks

This work develops a four-part, intent-oriented taxonomy that organizes multi-turn jailbreaks by adversarial intent structure and finds that effectiveness is driven by how deliberately intent is organized across turns rather than by context length or query count.

Siyuan Li, Aodu Wulianghai, Zehao Liu et al. · 0 citations
Preprint Aug 2026

Breadcrumbing Search Agents

This work studies the channel delivering search and page observations is a fragile security boundary and introduces Authority-Chain Hijack (ACH), an expert-refined strategy that turns isolated search-result and page-content manipulations into a coherent evidence chain across seemingly corroborating sources.

Xuebin Li, Han-Qing Zhao, Siyuan Liang et al. · 0 citations

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