LINE CTF 2024

Overview

News

Please check the following media for updates.

• CTF Time: LINE CTF 2024
• Twitter:
  • (ja) @lycorptech_jp
  • (en) @lycorptechjp_e

Prizes

Rule

• Do not participate and play on multiple teams.
• Do not share flags or any hints.
• Do not ask other players who are not on the same team for hints on challenges via DM, etc.
• Do not attack scoreboard server or our infra. (e.g. DoS)
• Do not do scanning.
• The flag format is LINECTF{[0-9a-f]{32}}
• There is no team size limit


• The displayed amount of prize money will be transferred in USD. LY Coporation will bear the transfer cost.
• We will ask for your PII for payment of rewards and checking of anti-social forces
• For residents in Japan, we will ask your My Number for payment records
• We will not support the multiple transfer accounts. Only one bank account can receive the rewards


• We reserve the right to ban and disqualify any teams breaking any of these rules.
• The Top 3 will need to send us ([email protected] [email protected]) a writeup until 2024.03.25 09:00 (UTC+9)


• Unfortunately, due to current geopolitical events, participants from Russia are NOT eligible to receive prize money

Others

• Contact: [email protected]
• Bugbounty: https://hackerone.com/line

Hall Of Fame

• 2021:
  • 🥇 The Duck
  • 🥈 KimchiSushi
  • 🥉 rbtree fan club
• 2022:
  • 🥇 Super HexaGoN
  • 🥈 The Duck
  • 🥉 donkey
• 2023:
  • 🥇 The Duck
  • 🥈 Water Paddler
  • 🥉 HK Guesser
• 2024:
  • 🥇 The Duck
  • 🥈 ierae
  • 🥉 Friendly Maltese Citizens