Ji, Yonghyeon
Position: Master's Student, Department of Cyber Security, Kookmin University
Research Interests:
- Formal Verification, Machine-checked Proof
- Provable Security, Functional Correctness
- Algebraic Geometry, Algebraic Topology, Complex Analysis
- Algebraic Geometry Code
- Quantum Error-correction, Surface Code
Github: Hacker-Code-J
My research focuses on the intersection of Mathematics and Cryptography, with particular emphasis on formal verification, provable security, and algebraic structures in cryptographic systems.
I am dedicated to advancing both the theoretical foundations and practical implementations of secure cryptographic protocols, bridging rigorous mathematical analysis with real-world applications.
Education
- Mar. 2025 – Present: M.S. in Cyber Security, Kookmin University
- Thesis: TBA
- Mar. 2019 – Feb. 2025: B.S. in Information Security, Cryptology and Mathematics, Kookmin University
- 2016 - 2017: Institute of Information Security Education for the Gifted, Kongju National University
News
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(August 19, 2025) Welcome to the site
Publications
- [2026. 01] Complex Analysis and Riemann Surfaces - A Graduate Path to Algebraic Geometry
Compute-first lecture notes connecting classical complex analysis to compact Riemann surfaces and core algebraic geometry (line bundles, cohomology, Riemann–Roch, Jacobians).
See: https://arxiv.org/abs/2601.06868
Projects
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[2026.xx - 20xx.xx] Surface Code for Quantum Error-correction
TBA -
[2026.xx - 20xx.xx] Algebraic Geometry Code
TBA -
[2025.04 - 2028.12] Development of libOQS-based PQC-KEM/SIG Library
We develop the libOQS-based library for ML-KEM/DSA and Falcon. -
[2025.04 - 2025.11] Optimized implementation of NCC-SIGN Trinomial on ARMv8
A study on a quantum-safe, hard-to-solve public-key cryptographic algorithm. -
[2023.09 - 2023.12] Provable Security in Cryptography
We study the provable security in cryptography. -
[2023.09 - 2023.12] Discrete Logarithm Problem solver with Big-number Arithmetic Library
We develop the discrete logarithm problem solver with the big-number arithmetic library. -
[2022.03 - 2027.02] Optimized implementation of ALTEQ on ARMv8
A study on PQC optimization and security protocol migration to neutralize advanced quantum attacks in Beyond 5G-based next-generation IoT computing environments
Techniques
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[Mathematics] Riemann–Roch
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[Cryptography] Number Theoretic Transform (NTT)
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[Mathematics] One-form
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[Programming] Neon Programming
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[Cryptography] Cryptography Title
Notes
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[mathematics,cryptography] TikZ Gallery by J.YH
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[mathematics,programming] Review for 2025 mathematics & programming study
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[Assebmly] ARMv8-A vs Cortex-A vs AArch64
Codes
- DLP calculator — 2023-2 Advanced Application Programming.

