About

Hi, I’m bl4nk, a cybersecurity specialist currently serving as a captain in the Republic of Korea Army.

Education

• 2020 ~ Present : Korea University
  • Ph.D. candidate in Department of Information Security
• 2017 ~ 2018 : Best of the Best (Next-Generation Security Leader Training Program)
  • Vulnerability Analysis track
• 2015 ~ 2019 : Korea University
  • Bachelor’s degree in Department of Cyber Defense
• 2011 ~ 2014 : Goyang Foreign Language High School
  • Majored in English

Work Experience

• 2022 ~ Present : Redacted for security reasons
• 2019 ~ 2022 : Republic of Korea Cyber Operations Command
  • Vulnerability research for pen-testing
  • Conducted simulations of real-world cyberattacks to evaluate security levels

Award

• 2025 White Hat Contest as team “BSBP”
  • 3rd place in the Military division
• 2024 White Hat Contest as team “Hasan”
  • 2nd place in the Military division

Project

• 2017 ~ 2018 : Smart Home Hacking in the Real World with team “Emohtrams”
  • Found multiple vulnerabilities in system, web, embedded, and network
  • Delivered presentations at
    • 2019 HITB Security Conference
    • 2018 Codegate Conference
    • 2018 CodeEngn Conference
    • etc

Language

• Korean(C2 : Mastery¹)
• English(C1 : Advanced)
• Japanese(B1 : Threshold)