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Chen Hou

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#artificial intelligence Preprint Oct 2026

Cost-Efficient Privacy Enforcement for Email-Generating LLM Agents under Strategic Information Requests

LLM agents now act as delegated communication intermediaries: they read private context, draft messages, and send externally visible emails on behalf of a user. Existing checker-repair defenses can reduce inappropriate disclosure, but they rely on repeated calls to a remote action LLM (the model that drafts and repairs...

Qi-Kun Cai, Tao Huang, Chen Hou · 0 citations
#machine learning Preprint Sep 2026

Energy Time-Series Imputation with Differentially Private Diffusion Models via Clipping-Aware Objective Conditioning

Reliable recovery of missing measurements is important for monitoring and analysis in energy time-series systems, where fine-grained measurements may contain sensitive temporal information. Diffusion models trained with differentially private stochastic gradient descent (DP-SGD) provide a promising framework for privac...

Hui-Zhen Huang, Yu Li, Tao Huang et al. · 0 citations
#machine learning Preprint Sep 2026

A Lightweight Plug-in Gate for Transformer-Based Time-Series Forecasters

The interface is implemented with a lightweight representation-level pre-encoder gate that assigns sigmoid scores to representation units, and the usage penalty reduces average admission scores while keeping forecasting errors close to the unpenalized TimeXer setting.

Hong-Kai Zhuang, Tao Huang, Chen Hou · 0 citations
#artificial intelligence Preprint Sep 2026

CIPL: A Channel-Aware Framework for Recoverable Privacy Leakage in LLM Agents

CIPL (Channel Inversion for Privacy Leakage), a channel-aware evaluation framework for black-box privacy leakage in LLM agents, is presented and provides a common framework for comparing how internal sensitive dependence is realized as externally recoverable leakage across heterogeneous agent pipelines.

Tao Huang, Guo-Xin Wu, Guo-Long Zheng et al. · 0 citations
#artificial intelligence Preprint Sep 2026

PAPC: Platform Mediation for Privacy-Propagation Externalities in AI-Mediated Workflows

This work presents PAPC, a platform-mediated mechanism that intercepts information-moving events before they update shared state or external channels and positions event-level mediation as a platform-governance primitive for agent-mediated online work.

Tao Huang, Guo-Xin Wu, Chen Hou et al. · 0 citations
#artificial intelligence Review Sep 2026

ASLEval: Measuring Privacy Exposure Displacement in LLM Agent Sessions

Privacy exposure displacement, the mismatch between a local evaluation proxy and target-grounded session exposure, and ASLEval, an authorization-aware framework that pre-registers a hidden target set, measures all declared visible exits, and reserves internal traces for diagnosis are introduced.

Guo-Xin Wu, Hui-Zhen Huang, Guo-Xiong Long et al. · 0 citations

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