Sunpill Kim
Postdoctoral researcher at Hanyang University, working at the intersection of applied mathematics, security, and AI — using the geometry of learned representations to study what modern recognition systems leak, and how to defend them.
I received my B.S. (2020) and Ph.D. (2026) in Mathematics from Hanyang University, and have been a member of the Cryptology & Algorithm Lab under Professor Jae Hong Seo since 2018. I am currently a postdoctoral researcher at the same group.
From January 2023 to January 2024 I was an ARAP scholar at the A*STAR Institute for Infocomm Research (Singapore), working with Dr. Khin Mi Mi Aung and Dr. Yong Kiam Tan.
My work studies the security of metric-learning–based recognition systems — face recognizers, speaker recognizers, and the vision–language models built on the same geometric primitives. The thread that runs through it is mathematical: representation spaces have structure, and that structure governs both what an attacker can extract and what a defender can hide. The pieces I have worked on so far are non-adaptive attacks, biometric template protection, and certified robustness for recognition. See the research page for an overview, or publications for the full list.
I have served as a reviewer for NeurIPS, CVPR (2024–26), ECCV, BMVC, and IEEE journals (TIFS, TDSC). My doctoral work was recognized with Hanyang's Outstanding Ph.D. Dissertation Award (2026) and supported by the 1st Graduate Presidential Science Scholarship (2024–26, sole finalist in Mathematics). I led an NRF-funded project on secure biometric authentication as Principal Investigator (2024–25).
- Apr 2026 Served as a reviewer for NeurIPS 2026.
- Apr 2026 IEEE Access accepts SilverMask: Face Template Protection with Fine-Grained Noise-CorrectionM. Kim*, S. Paik*, S. Baek, S. Shin, S. Kim, J. H. Seo
- Apr 2026 ACM CCS 2026 accepts Casting the Net! Revisiting MasterFace Impersonation AttacksS. Paik*, S. Kim*, C. Hwang, J. H. Seo
- Feb 2026 Received the Outstanding Ph.D. Dissertation Award from Hanyang University. Thesis: Score-Based Non-Adaptive Attack Against Face Recognition Systems.
- Jan 2026 Served as a reviewer for ECCV 2026.
- Dec 2025 IEEE Access accepts Doubly Efficient Fuzzy Private Set Intersection for High-Dimensional Data with Cosine SimilarityH. Son, S. Paik, Y. Kim, S. Kim, H. Chung, J. H. Seo
- Dec 2025 IEEE T-BIOM accepts Towards Certifiably Robust Face Recognition: Analyses and ImprovementsS. Paik, D. Kim, C. Hwang, S. Kim, J. H. Seo
- Nov 2025 IEEE TDSC accepts On the Reversibility of Locality-Sensitive Hashing-based Biometric Template ProtectionsS. Paik, C. Hwang, S. Kim, J. H. Seo
- Sep 2025 NeurIPS 2025 accepts Non-Adaptive Adversarial Face Generation in the DarkS. Kim, S. Paik, C. Hwang, M. Kim, J. H. Seo
- Sep 2025 Served as a reviewer for CVPR 2026.
- Sep 2025 IEEE ICTC 2025 accepts A Survey of Model Inversion Attacks on Image DomainC. Kim, C. Hwang, S. Kim, J. H. Seo
- Jun 2025 ICCV 2025 accepts IDFace: Face Template Protection for Efficient and Secure IdentificationS. Kim*, S. Paik*, C. Hwang, D. Kim, J. Shin, J. H. Seo