CV
Contact Information
| Name | Jihwan Kim |
| aqua4689@snu.ac.kr |
Experience
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2025.01 - Seoul, South Korea
Researcher
Optimization & Machine Learning Laboratory
- Advisor: Chulhee Yun
- Developed a four-term risk decomposition and compute-optimal exponents for one-pass signSGD in PLRF.
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2024.01 - 2024.08 Seoul, South Korea
Researcher
Cryptography Laboratory
- Advisor: Junghee Cheon
- Proposed an algorithm to enhance the efficiency of CKKS bootstrapping.
Education
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2023.03 - Seoul, South Korea
Bachelor of Science
Seoul National University
Mathematics and Computer Science
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2020.03 - 2023.02 Seoul, South Korea
High School Diploma
Seoul Science High School
Awards
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2025.1 Simon Marais Mathematics Competition (Pairs)
Pairs 7th place (7/448 = 2%).
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2024.11 Korean Undergraduates Mathematics Competition
Gold Prize.
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2024.1 National Cryptography Contest
Special Prize (related to OverModRaise).
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2023.1 Simon Marais Mathematics Competition (Individual)
Individual 8th place (8/442 = 2%).
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2023, 2024 Dean's List (Department of Natural Science)
Seoul National University
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2023 Korea Presidential Science Scholarship
Scholarship (9k/year) for 2023-2027.
Publications
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2026 Scaling Laws of SignSGD in Linear Regression: When Does It Outperform SGD?
International Conference on Learning Representations (ICLR)
Derived scaling-law theory for one-pass signSGD in the PLRF model, including risk decomposition and compute-optimal exponents.
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2025 OverModRaise: Reducing Modulus Consumption of CKKS Bootstrapping
IACR Communications in Cryptology
Proposed and implemented an algorithm improving the efficiency of CKKS bootstrapping by reducing modulus consumption.
Skills
Programming: Python, C++
Languages: Korean (mother tongue), English (fluent)