Hyeonhak Kim | Cryptographer & Developer
Recent Interests
- Isogeny-based Post-Quantum Cryptography
- Quantum Cryptography : Quantum Money
- Module-Lattice Analysis
Skills
- Backend & Frontend Engineering
- Language : C, C++, Python, Rust, Flutter, javascript
- Security Analysis
- Experiences : Chrome V8 1-day analysis, Windows PE file analysis
- Cryptography & Mathematics
- Cryptography : PQC (isogeny, lattice, etc.)
- Mathematics : linear algebra, algebraic integers, algebraic geometry
Careers
- 2017.06 ~ 2019.12 : Agency for Defense Development, South Korea
- 2020.01 ~ 2024.06 : Defense Security Agency, South Korea
- 2024.06 ~ present : School of Cybersecurity, Korea University, South Korea
Educations
- 2013.03 ~ 2017.03 : Bachelor’s degree in Korea University
- 2018.09 ~ present : Ph.D. in Korea University
Publications
- Hyeonhak Kim, Seokhie Hong, Suhri Kim, Sangjin Lee, “INKE: fast isogeny-based PKE using intermediate curves”, eprint, 2025 📖
- Hyeonhak Kim, Donghoe Heo, Seokhie Hong, “Cryptanalysis of isogeny-based quantum money with rational points”, eprint, 2025 📖
- Won Kim, Jeonghwan Lee, Hyeonhak Kim, Changmin Lee, “SQISign with fixed-precision integer arithmetic”, eprint, 2025 📖
- JeongHwan Lee, Donghoe Heo, Hyeonhak Kim, Gyusang Kim, Suhri Kim, Heeseok Kim, Seokhie Hong, “Fault attack on SQISign”, PQCrypto 2024 📖
- Hyeonhak Kim, Seokhie Hong, “New space-efficient quantum algorithm for binary elliptic curves using the optimized division algorithm”, Quantum Information Processing 22, 237 (2023) 📖
Awards
CTFs
Crypto
- 암호공모전 A 분야 우수상, 특별상 (2025)
- 암호공모전 문제풀이분야 최우수상 (2019)
- 암호경진대회 대상 (2019), 우수상 (2015, 2016, 2018)
- 부채널 분석 대회 정보보호학회장상 (2019)
Blog Posts
- Topic : Isogeny, Elliptic Curve, Post Quantum Cryptography, Quantum Analysis