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Home/Authors/Han Liu

Han Liu

16 indexed papers

Recent (6 mo)
16
With code
0
Influential cites
0
Benchmarked
0

Publications per year

16
26

Top categories

Crypto×9ML×7NLP×7AI×7Vision×2Robotics×1Multiagent×1Databases×1

Frequent co-authors

Qingshan Liu3×
Zihan Liu2×
Peihan Liu2×
Lucas Rosenblatt2×
Weiwei Kong2×
Natalia Ponomareva2×

Research Timeline

2026
Detecting RAG Extraction Attack via Dual-Path Runtime Integrity Game

The paper introduces CanaryRAG, a novel dual-path runtime defense mechanism that detects RAG Knowledge Base Leakage attacks by embedding canary tokens into retrieved knowledge chunks.

A Survey on Split Learning for LLM Fine-Tuning: Models, Systems, and Privacy Optimizations

This survey provides a comprehensive, structured taxonomy of split learning techniques for fine-tuning Large Language Models (LLMs), covering model optimization, system efficiency, and privacy preservation.

AgentVisor: Defending LLM Agents Against Prompt Injection via Semantic Virtualization

AgentVisor is a novel defense framework that uses semantic virtualization, inspired by OS principles, to significantly reduce LLM agent vulnerability to prompt injection while maintaining high utility.

Low Rank Adaptation for Adversarial Perturbation

This paper demonstrates that adversarial perturbations possess a low-rank structure, and proposes a two-step method to leverage this property to significantly improve the efficiency and effectiveness of black-box adversarial attacks.

The Authorization-Execution Gap Is a Major Safety and Security Problem in Open-World Agents

The paper argues that the Authorization-Execution Gap (AEG)—the divergence between intended authorization and actual execution—is a critical safety and security flaw in open-world agents, requiring source-oriented, runtime integrity checks.

FERMI: Exploiting Relations for Membership Inference Against Tabular Diffusion Models

The paper proposes FERMI, a method that significantly improves membership inference attacks against tabular diffusion models by leveraging auxiliary relational information available during training, even when only single-table features are visible at inference time.

Secure UAV Swarms in Low-Altitude Wireless Networks: Challenges and Solutions

This paper proposes a cloud-edge-end collaborative defense framework to secure UAV swarms against various threats like GPS spoofing and multi-hop intrusions, demonstrating its effectiveness through experimental validation.

Controllable Lung Nodule Synthesis via Histogram-Regularized Latent Diffusion Models

The paper introduces a histogram-regularized latent diffusion model to synthesize highly realistic and subtype-specific pulmonary nodules in 3D CT volumes, addressing the limitations of existing methods that fail to capture accurate lesion-level intensity distributions.

Adaptive Interviewing for Persona Simulation in LLMs: Evidence-Grounded Reasoning Improves Decision Alignment

The paper introduces an adaptive interview framework to gather rich persona context, demonstrating that LLMs improve decision alignment in moral dilemmas only when they selectively ground their decisions in follow-up-derived, user-specific evidence.

MemPro: Agentic Memory Systems as Evolvable Programs

MemPro introduces a system-level evolution framework that treats the entire memory construction-retrieval pipeline as an evolvable program, significantly improving long-horizon agent performance over fixed-pipeline baselines.

On the Scaling of PEFT: Towards Million Personal Models of Trillion Parameters

The paper reframes Parameter-Efficient Fine-Tuning (PEFT) from a mere cost-saving alternative to a robust architecture for creating persistent, personalized models that layer specific behaviors onto large shared foundation models.

Not All Points Are Equal: Uncertainty-Aware 4D LiDAR Scene Synthesis

The paper introduces U4D, an uncertainty-aware framework that synthesizes 4D LiDAR scenes by prioritizing the reconstruction of geometrically difficult and uncertain regions first, leading to state-of-the-art fidelity and temporal consistency.

CAPF: Guiding Search-Agent Rollouts with Credit-Attenuated Privileged Feedback

The paper proposes Credit-Attenuated Privileged Feedback (CAPF), a training-time mechanism that uses verifier-side information to guide LLM search agents, significantly improving their performance on complex QA tasks.

Dynamic Trust-Aware Sparse Communication Topology for LLM-Based Multi-Agent Consensus

The paper proposes DySCo, a dynamic trust-aware sparse consensus mechanism, to efficiently manage communication in multi-agent LLM systems by selectively connecting agents based on real-time value, thus reducing overhead while maintaining critical cross-validation.

ContinuousBench: Can Differentially Private Synthetic Text Improve Capabilities?

The paper introduces ContinuousBench, a novel benchmark designed to rigorously test if differentially private (DP) synthetic text can genuinely transfer new knowledge, finding that state-of-the-art DP synthesis methods generally fail to achieve this capability gain.

ContinuousBench: Can Differentially Private Synthetic Text Improve Capabilities?

The paper introduces ContinuousBench, a dynamic benchmark designed to rigorously test if differentially private (DP) synthetic text can genuinely transfer new knowledge and capabilities from sensitive source corpora, finding that current state-of-the-art DP methods generally fail to achieve this.

Highlighted terms show continued research focus across papers

Papers

cs.LGcs.CLRecentJun 1, 2026

On the Scaling of PEFT: Towards Million Personal Models of Trillion Parameters

Mind Lab, :, Song Cao, Vic Cao +51 more

The paper reframes Parameter-Efficient Fine-Tuning (PEFT) from a mere cost-saving alternative to a robust architecture for creating persistent, personalized models that layer specific behaviors onto l…

View →
cs.CVcs.RORecentJun 1, 2026

Not All Points Are Equal: Uncertainty-Aware 4D LiDAR Scene Synthesis

Xiang Xu, Alan Liang, Youquan Liu, Xian Sun +4 more

The paper introduces U4D, an uncertainty-aware framework that synthesizes 4D LiDAR scenes by prioritizing the reconstruction of geometrically difficult and uncertain regions first, leading to state-of…

View →
cs.AIRecentJun 1, 2026

CAPF: Guiding Search-Agent Rollouts with Credit-Attenuated Privileged Feedback

Bin Chen, Xinye Liao, Yiming Liu, Xin Liao +1 more

The paper proposes Credit-Attenuated Privileged Feedback (CAPF), a training-time mechanism that uses verifier-side information to guide LLM search agents, significantly improving their performance on…

View →
cs.MAcs.AIRecentJun 1, 2026

Dynamic Trust-Aware Sparse Communication Topology for LLM-Based Multi-Agent Consensus

Wanshuang Gou, Zihan Liu

The paper proposes DySCo, a dynamic trust-aware sparse consensus mechanism, to efficiently manage communication in multi-agent LLM systems by selectively connecting agents based on real-time value, th…

View →
cs.LGcs.CLcs.CRRecentJun 1, 2026

ContinuousBench: Can Differentially Private Synthetic Text Improve Capabilities?

Peihan Liu, Lucas Rosenblatt, Weiwei Kong, Natalia Ponomareva +6 more

The paper introduces ContinuousBench, a novel benchmark designed to rigorously test if differentially private (DP) synthetic text can genuinely transfer new knowledge, finding that state-of-the-art DP…

View →
cs.LGcs.CLcs.CRRecentJun 1, 2026

ContinuousBench: Can Differentially Private Synthetic Text Improve Capabilities?

Peihan Liu, Lucas Rosenblatt, Weiwei Kong, Natalia Ponomareva +6 more

The paper introduces ContinuousBench, a dynamic benchmark designed to rigorously test if differentially private (DP) synthetic text can genuinely transfer new knowledge and capabilities from sensitive…

View →
cs.CLcs.AIRecentMay 30, 2026

MemPro: Agentic Memory Systems as Evolvable Programs

Qingshan Liu, Guoqing Wang, Wen Wu, Jingqi Huang +4 more

MemPro introduces a system-level evolution framework that treats the entire memory construction-retrieval pipeline as an evolvable program, significantly improving long-horizon agent performance over…

View →
cs.CVcs.AIcs.LGRecentMay 28, 2026

Controllable Lung Nodule Synthesis via Histogram-Regularized Latent Diffusion Models

Arunkumar Kannan, Yanbo Zhang, Han Liu, Michael Baumgartner +4 more

The paper introduces a histogram-regularized latent diffusion model to synthesize highly realistic and subtype-specific pulmonary nodules in 3D CT volumes, addressing the limitations of existing metho…

View →
cs.CLcs.AIRecentMay 28, 2026

Adaptive Interviewing for Persona Simulation in LLMs: Evidence-Grounded Reasoning Improves Decision Alignment

Ruoxi Su, Yuhan Liu, Jingyu Hu

The paper introduces an adaptive interview framework to gather rich persona context, demonstrating that LLMs improve decision alignment in moral dilemmas only when they selectively ground their decisi…

View →
cs.CRRecentMay 26, 2026

Secure UAV Swarms in Low-Altitude Wireless Networks: Challenges and Solutions

Yuntao Wang, Haojia Yang, Han Liu, Jianle Ba +1 more

This paper proposes a cloud-edge-end collaborative defense framework to secure UAV swarms against various threats like GPS spoofing and multi-hop intrusions, demonstrating its effectiveness through ex…

View →
cs.LGcs.CRcs.DBRecentMay 12, 2026

FERMI: Exploiting Relations for Membership Inference Against Tabular Diffusion Models

Abtin Mahyar, Masoumeh Shafieinejad, Yuhan Liu, Xi He

The paper proposes FERMI, a method that significantly improves membership inference attacks against tabular diffusion models by leveraging auxiliary relational information available during training, e…

View →
cs.CRcs.AIRecentMay 10, 2026

The Authorization-Execution Gap Is a Major Safety and Security Problem in Open-World Agents

Baoyuan Wu, Qingshan Liu, Adel Bibi, Irwin King +1 more

The paper argues that the Authorization-Execution Gap (AEG)—the divergence between intended authorization and actual execution—is a critical safety and security flaw in open-world agents, requiring so…

View →
cs.LGcs.CRRecentApr 30, 2026

Low Rank Adaptation for Adversarial Perturbation

Han Liu, Shanghao Shi, Yevgeniy Vorobeychik, Chongjie Zhang +1 more

This paper demonstrates that adversarial perturbations possess a low-rank structure, and proposes a two-step method to leverage this property to significantly improve the efficiency and effectiveness…

View →
cs.CRcs.CLcs.DCRecentApr 27, 2026

A Survey on Split Learning for LLM Fine-Tuning: Models, Systems, and Privacy Optimizations

Zihan Liu, Yizhen Wang, Rui Wang, Xiu Tang +1 more

This survey provides a comprehensive, structured taxonomy of split learning techniques for fine-tuning Large Language Models (LLMs), covering model optimization, system efficiency, and privacy preserv…

View →
cs.CRRecentApr 27, 2026

AgentVisor: Defending LLM Agents Against Prompt Injection via Semantic Virtualization

Zonghao Ying, Haozheng Wang, Jiangfan Liu, Quanchen Zou +4 more

AgentVisor is a novel defense framework that uses semantic virtualization, inspired by OS principles, to significantly reduce LLM agent vulnerability to prompt injection while maintaining high utility…

View →
cs.CRcs.AIcs.CLRecentApr 12, 2026

Detecting RAG Extraction Attack via Dual-Path Runtime Integrity Game

Yuanbo Xie, Yingjie Zhang, Yulin Li, Shouyou Song +4 more

The paper introduces CanaryRAG, a novel dual-path runtime defense mechanism that detects RAG Knowledge Base Leakage attacks by embedding canary tokens into retrieved knowledge chunks.

View →