About me

오호균 (Ho Kyun Oh) aka. ohk990102, ViceVersa
Security Researcher

Interested in Security & Machine Learning & Everything about computer


Education Link to heading

  • (Mar. 2017 ~ Feb. 2021) B.S. @ Korea University
    • Major: Bachelor of Engineering, Minor: Cyber Defense, Convergence Security
  • (Mar. 2022 ~ Present) Ph.D. @ Korea University

Team Link to heading

  • (2017 ~ 2021) Cykor
  • (2023 ~ Present) Call of Duty
  • (2024 ~ Present) Cold Fusion (Merger of Call of Duty, Cykor, CatFlag, PLUS, Haim, Definit, …)

Award Link to heading

CTF Link to heading

  • weird_vm challenge co-author @ WCTF 2019 (Team Cykor)
  • 4th @ zer0pts 2020 (Team Cykor)
  • 8th @ DEFCON CTF 2020 Finals (Team Cykor)
  • 1st @ CodeGate 2020 Quals & Finals College Division (Team Cykor)
  • BLPfs challenge co-author @ WCTF 2020 (Team Cykor)
  • 2nd @ zer0pts 2021 (Team K-Students)
  • 4th @ CCE 2023 Quals Public Organization Division (Team 팀명추천받습니다)
  • 1st @ CCE 2023 Finals Public Organization Division (Team 팀명추천받습니다)
  • 4th @ CTFZone 2023 Quals (Team Call of Duty)
  • 8th @ CTFZone 2023 Finals (Team Call of Duty)
  • 11th @ zer0pts 2023 (Team Call of Duty)
  • 6th @ DEFCON CTF 2024 Quals (Team Cold Fusion) - Writeup
  • 21st @ CodeGate 2024 Quals General Division (Team 원석이만믿고간다) - Writeup
  • 18th @ Google CTF 2024 Quals (Team Cold Fusion) - Writeup
  • 1st @ WhiteHat 2024 Quals (Team 이공김밥)

Contest Link to heading

  • Silver @ Korea Olympiad in Informatics Highschool Division 2016
  • 1st @ Cybersecurity AI & Bigdata Challenge 2023 Track A (Team 원석이만믿고간다) - Code

Training Link to heading

  • NATO CCDCOE Locked Shields 2023
  • 1st @ Netherland DCC CyberNet 2023

Experience Link to heading


Contact Link to heading

  • ohk990102 at gmail.com

  1. Mandatory military service period ↩︎