SECCON CTF is a capture the flag competition hosted by SECCON. This year, we will hold an online qualification round and on-site finals.

Rules

https://score.ctf.seccon.jp/rules

Game Style/Format

ONLINE / Jeopardy

Date

Sat, 13 Dec. 2025, 05:00 (UTC) to Sun, 14 Dec. 2025, 05:00 (UTC)

Duration

24 hours

Language

English

How to qualify

For international division: Top 8 teams
For domestic division: Top 8 teams that all team members are residents of Japan.

Registration

https://ctf.seccon.jp/

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Twitter
@secconctf