김도엽, DoYeop Kim, Kredsya.
I want to be a cryptographic researcher.
- Chung-Ang University
- Software (2021.03. ~ )
- GPA All 3.13/4.5
- Undergraduate researcher
- Cryptography Lab of Chung-Ang Univ. (2022.03. ~ 2023.06.) (2024.03. ~ 2025.07.)
- KITRI BoB 12th
- Security product development (2023.07. ~ 2024.03.)
- KITRI BoB 10th Alumni Association Officer (2024.04. ~ 2025.03.)
- 1단계 교육 TA
- KITRI WhiteHat School 2nd (2024.03.17., 2024.03.23., 2024.03.24., 2024.04.06., 2024.04.20., 2024.04.21.)
- APEX 2024 2nd Test-run (2024.07.19.)
- CSTEC
- APEX 2024 3rd Test-run (2024.08.14.)
- CSTEC
| Proficiency | Skills |
|---|---|
| Fluent | C, C++, Python, Git |
| Proficient | Github, Wireshark, Linux |
| Need Reference | Kotlin, Docker |
| Experienced (language) | Java, Rust |
| Experienced (CS) | MySQL, Unity, Arduino |
- 「길이기반 VPN 탐지 연구」, in CISC-W’23
- English title : 「Length-based VPN Detection Research」
- 김도엽, 유지훈, 김대호, 오상원, 권재민, 이경문 (한국정보기술연구원)
- First-authored paper
- OTDB : Database Search with RSA-based 1-out-of-n Oblivious Transfer
- VPN Identify & Block on Router Layer, VPN Hater (Github page)
- Conference paper presented once, Released as open source
| Project | Link | Tech Stack | Where |
|---|---|---|---|
| Implementation 3 Algorithms of Probabilistic Lightning Progress Determination | C++, Python | interest-based club “Piltong”, of Hungjin High School | |
| Expanding Functionality of “Sentiment Analysis Program using Twitter4j and StanfordCoreNLP” | Twitter4j, StanfordCoreNLP, Java | Software Project, of CAU | |
| Forest of Patience parody | Github | C++, DirectX | Object Oriented Programming, of CAU |
| “QtGit”, GUI-based Git Repository Management Application | Github | Python, PyQt5 | Open Source SW Project, of CAU |
| “My Fridge”, Android Kotlin App with Firebase | Github | Kotlin, Android Studio, Firebase | Mobile App Development, of CAU |
| “Capture!”, Finding Spy-cam with Wi-Fi RSSI Trilateration | Github | Kotlin, Android Studio, Wi-Fi RSSI, FastAPI, SVM | Capstone Design(2), of CAU |
| Posture Feedback System “Spine Fairy” | IoT, Arduino, Flutter, ML | 2025 Interdisciplinary IoT Home Appliance Capstone Design Competition, of CAU | |
| Strategy Search Model Development using Pokémon Battles | Github | Python, MCTS, poke-env, Prompt Engineering, OpenAI API | Capstone Design(1), of CAU |
- CUI Modern Tetris
- Wiener’s Attack
- RSA-32 with C
| Name | Grade | Award | Date | Team name |
|---|---|---|---|---|
| ZeroPage Sprouthon 2021 | 1st Place | ￦ 160,000 | 2021.06.29. | 시작이반 |
| BYUCTF 2023 | 2nd Place | $ 75 | 2023.05.20. | budaejjigae |
| Nowruz 1404 | 3rd Place | 2025.03.15. | C4C (TeamH4C) | |
| Shakti CTF 2025 | 1st Place | 2025.07.25. | C4C (TeamH4C) | |
| 2025 Interdisciplinary IoT Home Appliance Capstone Design Competition | Idea Excellence Award (Finalist) | ￦ 100,000 | 2025.07.10. | 잠자는솦속의전전 |
| Name | Grade | Date | Team name |
|---|---|---|---|
| DEF CON CTF Qualifier 2024 | 26th Place / 1742 teams | 2024.05.04. | budaejjigae |
| 2024 Hacktheon CTF Preliminaries (Beginner category) | 37th Place | 2024.04.27. | ￠ |
| DEF CON CTF Qualifier 2023 | 24th Place / 1828 teams | 2023.05.29. | budaejjigae |
* budaejjigae = TeamH4C + Demon + PLUS + TOOR + individuals Joint team
- TOPCIT Level 3, IITP (2025.11.01.)
- With score 587/1000, very close to the Top 10% cutoff(611.5/1000)
- Scored in the Top 10% in ‘Software’ and ‘Information Security’
- ZeroPage 31st Generation Member (2021.03. ~ )
- CAUtion 0th Generation Member (2021.05. ~ )
- ZeroPage 32nd President (2022.01. ~ 2023.01.)
- TeamH4C Official Member (2022.07.08. ~ )
- Crypto, Forensic, Network, OSINT solver of C4C
- Presenter of 4th 해킹하는 부엉이들
- 2023 ISANG X CAUtion CTF (2023.01.13. ~ 2023.01.14.)
- Participate as problem author and organizing team.
- Make 4 Crypto problems,
- about Caesar Cipher, Frequency Analysis, Wiener’s Attack, Blind Signature.
- 2024 CAUtion X ISANG CTF (2024.01.29)
- Participated as problem author.
- Made 1 Crypto, 1 Misc problems,
- about RSA 1-2 OT, Github Credential Management.
- Mensa Korea, Full Member
- Percentile : 99% (2025.08.18.)
Presentation list
| Original Korean Title | English Title | Where | Date |
|---|---|---|---|
| 백준9267번 풀이설명회 | How to Solve Baekjoon #9267 | ZeroPage OMS | 2021.09.08. |
| RSA를 공격하는 방법 | How to Attack RSA Cryptosystem | ZeroPage Devils Camp 2022 | 2022.07.14. |
| 입문자를 위한 RSA 계산기로 두드려보기 | RSA Tutorial with Calculator for Newbies | 제4회 해킹하는 부엉이들 뉴비 웹세미나 | 2022.12.17. |
| OT(Oblivious Transfer) 설명회 | OT(Oblivious Transfer) Presentation | ZeroPage Devils Camp 2023 | 2023.06.30. |
| RSA가 실제로 동작하는 과정 디테일하게 알아보기 | Exploring the Detailed Process of RSA in Action | 2023 CCA 2nd Summer Seminar For newbies | 2023.08.06. |
| 밥심이다 팀 1차 발표 데모 동영상 | |||
| (OpenVPN(TCP) 프로토콜 차단) | Blocking OpenVPN(TCP) Protocol Demo Video | BoB Project 1st Presentation | 2023.10.28. |
| 길이기반 VPN 탐지 연구 | Length-based VPN Detection Research | CISC-W'23 Interactive Session | 2023.12.02. |
| 안드로이드로 몰래카메라 찾기 | Finding spy-cam via Android | Zeropage Devils Camp 2025 | 2025.08.09. |
| 암호학 Private Set Intersection 소개 | Indroduction of Private Set Intersection | 11th BISC for BoB 14th | 2025.11.29. |
| Original Korean Title | English Title | Where | Date |
|---|---|---|---|
| RSA 암호화 과정에서 사용되는 정수론의 재정리 | |||
| (고등학생이 이해할 수 있는 수준으로) | Number Theory Revisited in RSA Encryption Process (at a high school student level) | Hungjin High School Mathmatics Exploration Event | 2019.07.16. |
| RSA에 사용된 정수론의 알고리즘화 | Algorithmization of Number Theory used in RSA | Hungjin High School Mathmatics Exploration Competition | 2020.11.23. |
| RSA를 구현하면서 공부한 것들 | Things I Learned While Implementing RSA | ZeroPage OMS | 2021.05.19. |
| Twenty Years of Attacks on the RSA Cryptosystem | Twenty Years of Attacks on the RSA Cryptosystem | 암호 연구실 세미나 | 2022.07.05. |
| Wiener’s Attack의 구현 | Understanding Wiener’s Attack from the Implementation Side | ZeroPage OMS | 2022.11.09. |
| CTF 대회 운영진은 무엇을 하나요? (ISANG X CAUtion CTF 운영진 후기) | What Do CTF Organizers Do? (Review of ISANG X CAUtion CTF Organizing Team) | ZeroPage OMS | 2023.02.15. |
| Updatable Private Set Intersection | Updatable Private Set Intersection | Cryptography Lab Seminar | 2022.10.13. |
| 두 집합의 원소도 모르면서 교집합 연산하기 (를 가장한 UPSI 논문 리뷰) | How To Get Intersection Without Knowing the Elements of Two Sets (UPSI Reveiw) | ZeroPage OMS | 2023.05.08. |
| Write-up of Crypto Problems of CTF | Write-up of Crypto Problems of CTF | Cryptography Lab Seminar | 2023.05.26. |
| CTF Crypto 입문‘만’ 해보기 | CTF Crypto Introduction: Just the Basics | CAUtion 2차 내부 세미나 | 2023.05.31. |
| VPN 탐지 및 식별 | VPN Identify & Block on Router Layer | BoB 프로젝트 최종 발표평가 | 2023.12.16. |
| TCP 통신을 죽여봅시다 | Let’s kill TCP connection | ZeroPage OMS | 2024.03.20. |
| MEDS (Matrix Equivalence Digital Signature) | MEDS (Matrix Equivalence Digital Signature) | Cryptography Lab Seminar | 2024.07.31. |
| Updatable Private Set Intersection Revisited | Updatable Private Set Intersection Revisited | Cryptography Lab Seminar | 2025.02.05. |
| Membership Inference Attacks on PSI-functionalities | Membership Inference Attacks on PSI-functionalities | Cryptography Lab Seminar | 2025.05.12. |
| 잡아라! Wi-Fi RSSI 삼변측량으로 몰래카메라 찾기 | Capture! Finding Spy-cam via Wi-Fi RSSI Trilateration | Chung-Ang University’s Capstone Design(2) | 2025.06.13. |
| 바른자세 피드백 시스템 “척추요정” | Posture Feedback System “Spine Fairy” | 2025 Interdisciplinary IoT Home Appliance Capstone Design Competition | 2025.09.26. |
| 최적의 전략 탐색 모델 개발 : 포켓몬 배틀을 중심으로 | Strategy Search Model Development using Pokémon Battles | Chung-Ang University’s Capstone Design(1) | 2025.12.05. |