Computer engineering student in Busan, South Korea. I work from the bottom of the stack upward — CPU architecture, x86-64, compilers, and hardware security.

ORCID 0009-0009-0896-3833 · regx64.github.io

Korean Dubeolsik Acoustic Side-Channel Attack (KDAA) — in progress Recovering keystrokes from keyboard audio on the Korean Dubeolsik layout. Existing acoustic side-channel work targets English QWERTY, where one keystroke maps to one character. Dubeolsik breaks that assumption: two jamo share a physical key, and initial, medial, and final consonants compose into a single syllable. I handle the acoustic front end — log-mel input, CNN classification over 38 classes, special-key handling, top-N jamo probability output. → KDAA · classism

Von Neumann Bottleneck and Systolic Array Architecture: An Empirical Efficiency Comparison — Zenodo, 2026 A 2×2 systolic array built from Arduino Nano boards, comparing sequential von Neumann execution against output-stationary and weight-stationary dataflows on matrix multiplication. Measured cycle counts against the analytical model, with pipelined tiling for matrices larger than the grid. → 10.5281/zenodo.22038219 · Arduino-repo

• Sqimp — QEMU GUI wrapper. Tauri + Next.js + Rust.
• Cotton — A programming language and its Rust implementation. Spec v0.2, lexer working.
• percentage — Open Korean wiki with its own markup language, PerMark.
• chespedia — Chess knowledge base. MDX content served by Next.js with a Rust backend.
• liner-notes — A community for lyric excerpts and their readings. Next.js + Supabase, full-text search over lyrics.
• gijiguk — Past-exam practice for Korean language study.
• boj-cli — Baekjoon Online Judge from the terminal. Rust.
• KSCA — Korean Students Computer-Science Association. A national archive for student papers with persistent identifiers and versioning.

• 2024 — Korea Code Fair, Hackathon Division · Finalist
• 2024 — Embedded Software Contest · President's Award, Sejong University
• 2023–2025 — Information Gifted Education Center, Busan Metropolitan Office of Education · 3-year program,
• 2023–2025 — above center, Academic Excellence Award