Author

Hyeonjin Jang

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Open access 2026

Execution-Aware Stage-Wise Evaluation Framework for Indirect Prompt Injection in LLM-Based Email Agents

Indirect prompt injection (IPI) attacks have emerged as a critical security threat to large language model (LLM)-based email agents. However, existing evaluation benchmarks largely rely on simulated environments that cannot verify whether an attack will actually succeed in practice, often determining attack success sol...

Hyeonjin Jang, EunSeong Lee, Kyungbaek Kim et al. · IEEE Access · 0 citations

Conference Jul 2026

Communication-Aware Adaptive Decentralized Traffic Signal Control via Broadcast gate

GNN-based multi-agent reinforcement learning (MARL) for adaptive traffic signal control typically assumes unrestricted neighbor communication at every decision step, with the cost of that messaging rarely measured. We propose a learned sparse communication gating framework in which each intersection decides, via a diff...

Minjun Choi, Geonmin Kim, Hyeonjin Jang et al. · International Conference on... · 0 citations