Papers by Yujin Choi
FinHarmBench: Financial Jailbreak Benchmark and Unsupervised Safety Fine-Tuning via Refusal Steering Distillation (2026.acl-industry)
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Yubin Choi, Yujin Yang, Subin Kim, Seokil Ham, Seungju Cho, Jungmin Son, Youngjun Kwak, Changick Kim
| Challenge: | Existing safety benchmarks focus on general harms and lack the granularity needed to capture domain-specific financial threats. |
| Approach: | They propose a benchmark to evaluate financially harmful and confusable benign prompts. |
| Outcome: | The proposed framework improves refusal behavior without annotating refusal responses. |
Safeguarding Privacy of Retrieval Data against Membership Inference Attacks: Is This Query Too Close to Home? (2025.findings-emnlp)
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| Challenge: | delivering private retrieved documents directly to LLMs introduces vulnerability to membership inference attacks . |
| Approach: | They propose a similarity-based membership inference attack detection framework for RAG . they propose obfuscate attackers, maintain data utility, and remain system-agnostic . |
| Outcome: | The proposed framework can detect and hide membership inference attacks, while remaining system-agnostic against them. |