About me

I received my B.S. in Mathematics from Hanyang University and will receive my Ph.D. in Applied Mathematics from the same institution in February 2026. Since July 2018, I have been a member of the Cryptology & Algorithm Lab, where I was advised by Professor Jae Hong Seo.

From January 2023 to January 2024, I was an ARAP scholar at A*STAR Institute for Infocomm Research, working under the supervision of Dr. Khin Mi Mi Aung and Dr. Tan Yong Kiam.

My research focuses on the security and vulnerability analysis of metric-learning–based recognition systems, including biometric and vision–language models. My work spans adversarial attacks, biometric template protection, and related detection tasks, with an emphasis on both theoretical foundations and practical deployment.

News

(Dec 22, 2025) The following paper has been accepted for publication at IEEE Access.
- Hyunjung Son, Seunghun Paik, Yunki Kim, Sunpill Kim, Heewon Chung, and Jae Hong Seo
  Doubly Efficient Fuzzy Private Set Intersection for High-dimensional Data with Cosine Similarity
(Dec 3, 2025) The following paper has been accepted for publication at IEEE T-BIOM.
- Seunghun Paik, Dongsoo Kim, Chanwoo Hwang, Sunpill Kim, and Jae Hong Seo
  Towards Certifiably Robust Face Recognition: Analyses and Improvements
(Nov 15, 2025) The following paper has been accepted for publication at IEEE TDSC.
- Seunghun Paik, Chanwoo Hwang, Sunpill Kim, and Jae Hong Seo
  On the Reversibility of Locality-Sensitive Hashing-based Biometric Template Protections
(Sep 19, 2025) The following paper has been accepted for presentation at NeurIPS 2025.
- Sunpill Kim, Seunghun Paik, Chanwoo Hwang, Minsu Kim, and Jae Hong Seo
  Non-Adaptive Adversarial Face Generation
(Sep 15, 2025) I have participated in CVPR 2026 as a reviewer.
(Sep 07, 2025) The following paper has been accepted for presentation at IEEE ICTC 2025.
- Changjin Kim, Chanwoo Hwang, Sunpill Kim, and Jae Hong Seo
  A Survey of Model Inversion Attacks on Image Domain
(Jun 26, 2025) The following paper has been accepted for presentation at ICCV 2025.
- Sunpill Kim*, Seunghun Paik*, Chanwoo Hwang, Dongsoo Kim, Junbum Shin, and Jae Hong Seo (*: Equal Contribution)
  IDFace: Face Template Protection for Efficient and Secure Identification
(Feb 11, 2025) Paper won Top award at the Best Research Paper Award 2024 (The Research Institute for Natural Sciences, Hanyang University) for graduate students.
- Sunpill Kim, Yong Kiam Tan, Bora Jeong, Soumik Mondal, Khin Mi Mi Aung, and Jae Hong Seo
  Scores Tell Everything about Bob: Non-adaptive Face Reconstruction on Face Recognition Systems
(Jan 1, 2025) The following paper has been accepted for publication at Pattern Recognition.
- Sunpill Kim, Hoyong Shin, and Jae Hong Seo
  Deep Face Template Protection in the Wild
(Nov 11, 2024) I have participated in CVPR 2025 as a reviewer.
(Oct 11, 2024) Paper won Encouragement award at the National Cryptographic Technology Contest, 2024.
- The following paper won the Encouragement Award. Congrats all authors who participated in this submission.
  - Seunghun Paik, Minsu Kim, Sunpill Kim, and Jae Hong Seo
    On the Security-Accuracy Trade-off of Hash-based Face Template Protections
(Jul 1, 2024) The following paper has been accepted for presentation at ECCV 2024.
- Seunghun Paik, Dongsoo Kim, Chanwoo Hwang, Sunpill Kim and Jae Hong Seo
  Towards Certifiably Robust Face Recognition
(Jun 24, 2024) The following project supported by National Research Foundation of Korea (NRF) have started. Also, this is my first research project as a Principal Investigator.
- Secure Authentication System using Deep Learning-based Biometric Recognition System
(Jun 7, 2024) The following paper has been accepted for presentation at CISC-S 2024. Also, this paper won the Excellenct Paper Award.
- Seunghun Paik, Dongsoo Kim, Chanwoo Hwang, Sunpill Kim and Jae Hong Seo
  On the Certifiable Robustness of Face Recognition Systems
(Apr 10, 2024) I was selected as the 1st Graduate Presidential Science Scholarship recipient. (Ph.D. student in the Department of Mathematics, 2 finalists selected)
(Apr 1, 2024) The following project supported by Korea Creative Content Agency (KOCCA) has started.
- International Joint Research to Develop Next-generation Copyright Infringement Prevention Technology and Safe Content Distribution Technology

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(Dec 10, 2023) I have participated in CVPR 2024 as a reviewer.
(Oct 28, 2023) The following paper has been accepted for presentation at the IEEE S&P 2024.
- Sunpill Kim, Yong Kiam Tan, Bora Jeong, Soumik Mondal, Khin Mi Mi Aung, and Jae Hong Seo
  "Scores Tell Everything about Bob: Non-adaptive Face Reconstruction on Face Recognition Systems"
(Oct 4, 2023) Papers won several awards at the National Cryptographic Technology Contest, 2023.
- The following paper won the Excellence Award.
  - Sunpill Kim, Seunghun Paik, Chanwoo Hwang, Dongsu Kim, Junbum Shin, and Jae Hong Seo
    IDFace: Efficient and Secure Identification for Face Images
- The following paper won the Encouragement Award.
  - Sunpill Kim, Yong Kiam Tan, Bora Jeong, Soumik Mondal, Khin Mi Mi Aung, and Jae Hong Seo
    Scores Tell Everything about Bob: Non-adaptive Face Reconstruction on Face Recognition Systems
(Aug 22, 2023) The following paper has been accepted for presentation at the BMVC 2023 (Oral).
- Seunghun Paik, Sunpill Kim, and Jae Hong Seo
  "Security Analysis on Locality-Sensitive Hashing-Based Biometric Template Protection Schemes"
(Jan 7, 2023) Participate in a new project supported by A*STAR (Singapore).
(Dec 6, 2022) Our paper (Analysis on Secure Triplet Loss) is accepted at IEEE Access.
(Sep 27, 2022) The following paper won the special prize at "National Cryptographic Technology Contest, 2022".
- Title: Deep Face Template Protection in the Wild
  Participant: Sunpill Kim (Hanyang University), Hoyong Shin (Hankuk University of Foreign Studies), and Jae Hong Seo (Hanyang University)
(Jul 11, 2022) Participate in a new project supported by CRYPTOLAB.
(Title: "Development of Encrypted Face Template DB Search Technology")
(Apr 28, 2022) Presentation of research results related to Deep Face Template Protection in the wild at 2022 KMS Spring Meeting
(Feb 22, 2022) Participate in a new project supported by Korea Institute of Information Security & Cryptology.
(Title: "Research on Biometric Information Extraction Threats and Protection Methods in Deep Learning-based Face Recognition")
(Dec 23, 2021) I will receive a scholarship of about $10000 from the Samil Foundation until February 2023.
(Nov 5, 2021) Presentation of research results related to Ironmask at 2021 KAIC Fall Meeting
Participate in a new project supported by Samsung Science & Technology Foundation.
(Title: "Secure Multi-party Approximate Computation")
Presentation of research results related to Ironmask at SSTF 2021

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Participate in a new project supported by Institute for Information and Communications Technology Promotion (IITP).
(Title: "Study on Crypto Primitives for SNARK")
Participate in a new project supported by National Security Research Institute (NSR).
(Title: "Research on Incrementally Verifiable Computation Design Technique and Application Method")
One paper (IronMask: Modular Architecture for Protecting Deep Face Template) accepted at CVPR 2021

Programming Skills

Familiar with: Python, PyTorch, TeX.

Languages

Language	Level
Korean	Native
English	Intermediate

Contact

For any inquires, you can reach me via email: ksp0352@gmail.com

Sunpill Kim