Koh You Liang

Security Engineer

Profile

Trilingual (English, Mandarin Chinese, Japanese)
GameSec and AppSec Engineer

Technical

  • Python
  • Java/Kotlin
  • Javascript
  • Swift
  • PHP
  • Infrastructure Hacking (BH)
  • TOEFL iBT 110 (2017)
  • JLPT N2 (2015)
  • ARM IoT Exploitation (HITB)

Experience

Security Engineer @ LINE Corporation

Tokyo, Japan

Jan 2018 -

  • Internal security pentesting and risk assessments, doing both Blackbox and Whitebox testing
  • Developed CI tool for automatic scanning of binaries on build
  • Bug bounty report reviewing, PR recruitment support
  • Reverse engineering of third-party cheat tools to prevent cheats and ban players
  • Supply Admin @ Singapore Armed Forces

    Singapore, Singapore

    Mar 2012 - Mar 2014

  • Developed algorithms for cookhouse food allocations
  • Event planning, accounting and general administration
  • Education

    Masters at Keio University - Tokyo, Japan

    Cyber Informatics Major

    2018

  • 4.0 GPA
  • Graduate School of Media and Governance, Year 2 / 二年生(休学中)
  • Currently on long leave for work; no plans to continue in the near future
  • Undergraduate at Keio University - Tokyo, Japan

    Cyber Security Major

    Sep 2014 - Sep 2018

  • 3.4 GPA
  • Faculty of Environment and Information Studies
  • Bachelor Thesis
  • Published Apps (Google Play)
  • Achievements

    CTF - Participation

    ※ 2019, Finalist, BCTF at DEFCON China 1.0 with OpenBlue
    ※ 2019, Finalist, ISITDTU CTF with OpenToAll
    ※ 2019, Winner, Red Alert ICS CTF with CTF.SG
    ※ 2019, 2nd place, OpenCTF with OpenToAll

    Presentations

    Bug Bounty: Good and Rich Hackers @ Taiwan Becks #4

    Others

    ※ 2016, Tsuji International (Sanrio) Scholarship
    ※ 2015, Keio University Scholarship
    ※ 2008, Overall Silver Award at World Media Masters Competition, Singapore
    ※ 2008, 9th place at Public Service Chess Competition, Singapore
    ※ 2008, 17th place at Good Friday Rapid Chess Competition, Singapore
    ※ 2007, Most Outstanding Use of Adobe Products at New Media Arts Challenge, Singapore

    Koh You Liang — admin@ylkoh.top — aka Isopach