DoYeop Kim

Security Engineering · Cryptography · Network Security

Experience

WooriNet | Engineer Optical R&D Group, Optical Communications Software Team · Mar 2026–Present

• Develop TLS modules integrating KCMVP cryptographic modules and post-quantum cryptography (PQC).
• Contribute to internal LLM adoption, including AI-assisted CVE patching and remediation documentation.
• Develop WCrypto, a software cryptographic module targeting KCMVP Level 1.

Cryptography Lab | Undergraduate Researcher Chung-Ang University Mar 2022–Jun 2023; Mar 2024–Jul 2025

• Reviewed cryptography papers, presented in internal lab seminars, and contributed to technical reports.

Projects and Research

**VPN Hater | KITRI BoB Team Project**

• Developed a C++ system for detecting and blocking VPN traffic at the router level.
• First author of “길이기반 VPN 탐지 연구” (Length-based VPN Detection Research), presented at CISC-W’23 in Dec 2023.

**Capture | Chung-Ang University Capstone**

• Developed RSSI trilateration, packet-capture, and Kalman-filter components for an Android-based hidden-camera localization project.
• Project technologies: Kotlin, Android Studio, Wi-Fi RSSI, FastAPI, and SVM.

CTF Results

TeamH4C | Cryptography, Digital Forensics, Networking, and OSINT

• 1st, SekaiCTF 2026
• 5th, CODEGATE CTF 2026 Preliminary