Layer7 CTF 2025

Layer7, the security club at Sunrin Internet High School, is celebrating 15 years of running CTFs and offensive security research. We are back this year with a special anniversary CTF — individual participants only! Registration Period: October 22, 2025 ~ November 12, 2025 (KTC) Sponsors: Dreamhack, HSPACE, ENKI Whitehat Prize Pool: ₩3,000,000 + merchandise Participation: Individual registration only (no teams) Format: Jeopardy-style Register: https://ctf.layer7.kr Additional Information: Please check the registration page for full details and schedule. Don’t miss the registration deadline! Looking forward to seeing you in the competition. Contact: ctf@layer7.kr