Announcement of SECCON CTF 2020 Online Competition

SECCON CTF is a capture the flag competition hosted by SECCON.
This year we've restarted with young members. we think you will enjoy it.


Format Jeopardy
Date Start: Sat, 10 Oct 2020, 06:00 (UTC)
End: Sun, 11 Oct 2020, 06:00 (UTC)
Duration 24 hours
Language English.


  1. Scores will be aggregated to per teams.
  2. We use dynamic scoring - challenges with more solves are worth less points.
  3. Depending on the answering situation of the challenge, we will add a challenge.
  4. The flag format is "SECCON{[\x20-\x7e]+}". We write the format in the challenge description for exceptions.
  5. If you submit wrong flags repeatedly in a short period of time, the form will be locked for a while.

Prohibited matter

We strictly prohibit the following acts during the competition:

  • Attempt to attack or interfere with other teams.
  • Attempt to attack the scoreboard.
  • Attempt to excessively increase the load on the server or network. (None of the challenges requires enumerations/brute-forcing)
  • Share the flags or solutions with other teams.
  • Attempt to attack other servers and networks.
  • Any acts to inhibit the operation.

If fraud is found, we'll impose on the team deduction or disqualification as a penalty by our discretion. Even if we discovered after finished, we'll address it in the same way.



Discord (SECCON 2020 OnlineCTF)



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SECCON CTF 2020 のお知らせ (CTF 参加方法等)

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Final Result of SECCON CTF 2020.