information security & capture the flag

I’ve participated in several information security competitions, sometimes under teams /bad or mushroom 🍄. Cryptography and reverse engineering puzzles are my sort of thing.

See a list of my writeups here.

2024

• Played a bunch with Friendly Maltese Citizens, with some highlights of:
  • Winning finishes in 1 2 3 4 5 6 7 events and podium in a bunch more
  • Meeting cool people at DEFCON 32
  • Pre-qualifying for DEFCON 33 CTF twice 🥴
• GEEKCTF (writeups) - Individual 2nd place as 𐎼𐎠𐎱𐎹𐎢𐎫𐎠
• GreyCTF 2024 Finals - Team 3rd place with 粥
• NSUCrypto 2024 - Round 2 Gold with some friends from FMC

2023

• Hack-A-Sat 4 Qualifiers (writeups) - Played with Tea MSG, Team 14th place
• GreyCTF 2023 Finals (writeups) - Team 8th place overall and 4th place among local teams
• TISC 2023 by CSIT - 8/10 challenges cleared, Individual 10th
• Writeup prize for SekaiCTF

2022

• Hack-A-Sat 3 Qualifiers - Played with Tea MSG, Team 13th place
• SEETF 2022 (writeups) - Played with claypot RCE, Team 4th
• ENISA International Cybersecurity Challenge 2022 (writeup) - Played with ACSC Team, 🥇 Team 1st for Attack & Defence and 🥈 Team 2nd overall
• TISC 2022 by CSIT - 5/10 challenges cleared, Individual 13th
• Writeup prizes for Google CTF, UIUCTF and ImaginaryCTF

2021

• CDDC 2021 by DSTA - 🥇 Team 1st place (it’s a long story)
• ACSC 2021 (writeups) - 9th overall, 🥈 Individual 2nd in Singapore
• ASEAN Cyber SEA Games 2021 - Represented 🇸🇬 Singapore, Team 3rd
• TISC 2021 by CSIT - 5/10 challenges cleared, Individual 7th

2020 & earlier

• STACK the Flags 2020 by Govtech (writeups) - Team 8th place, Tertiary category
• Cybersecurity Challenge Singapore 2018 by CSA - 🥇 Top 6 indivdual + Top Team prize
• Cybersecurity Challenge UK 2018 - ✈️ Part of Singapore delegation
• CDDC 2017 (DSTA) - 🥉 3rd place, JC/IP category
• Cybersecurity Challenge Singapore 2017 by CSA - 🥇 Top 6 indivdual + Top Team prize