2025.12.20 Sat. 07:00 UTC
2025.12.21 Sun. 07:00 UTC
REGISTRATIONorganized by
Theoretical Science Group (TSG)
sponsored by
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TSG is the official computer society of The University of Tokyo, and also the name of the CTF team organized by
its members.
Again this year, we have prepared what we consider to be interesting challenges.
As a bonus, the greatest teams will be awarded a prize with $$$ thanks to GMO
Flatt Security Inc. Don’t miss it!
* The winning team qualifies for the SECCON CTF 14 Finals (International Division).
If the first-place team has already qualified, it will receive another entry unless it declines; if the team
withdraws from qualification, the second-place team qualifies instead.
* The prize will be paid with PayPal. If it doesn't suit you, we can pay that in BitCoin at an arbitrary
exchange rate we determine.
* The teams must publish the writeups of the solved problems to get their prizes.
Don’t prevent other teams from having fun.
Don’t share flags or hints, or you’ll be banned.
Don’t attack (e.g. DoS) our infrastructure, or you’ll be banned.
Don’t do automated scanning. It will be considered to be DoS.
The flag format is TSGCTF{blahblah}, unless otherwise specified.
The number of members in a team is unlimited.
People who belong to TSG are not allowed to participate in TSG CTF.
X:@tsgctf
GMO Flatt Security, based in Tokyo, offers expert security assessments and penetration testing for software.
Our seasoned professionals deliver proven, top-tier services.
We also provide Takumi byGMO, the AI Security Engineer that brings human-level reasoning to application
security.
東京に拠点を置くGMO Flatt Securityは、ソフトウェアを対象とした専門的な脆弱性診断およびペネトレーションテストを提供しています。
当社の経験豊富なプロフェッショナルが、実績のある最高水準のサービスをご提供します。
加えて、当社はアプリケーションセキュリティに人間レベルの推論をもたらすAIセキュリティエンジニア、Takumi byGMOも提供しています。
We are planning to hold an on-site final in Tokyo in Spring 2026 for the top-ranking domestic teams(*) of TSG CTF 2025. Details regarding the number of qualifying teams and participants will be announced at a later date.
TSG CTF 2025では、成績上位のDomesticチーム(*)を対象に、
2026年春にオンサイト決勝を東京都内で開催する予定です。
参加できるチーム数や人数などの詳細は追ってお知らせします。
