As part of the C2C CTF 2023, we will hold webinars that will include talks and discussions on CTF topics and related cyber security issues. Recordings of past webinars April 24, 2023 https://c2c-ctf-2023.cysec-lab.keio.ac.jp/wp-content/uploads/2023/04/2023-04-24-c2c-ctf-webinar-2-02.mp4 January 31, 2023 https://c2c-ctf-2023.cysec-lab.keio.ac.jp/wp-content/uploads/2023/02/C2C-Capture-The-Flag-Comp-2023.mp4