あとで見つけたんですが問題が勉強になりそうだったので。 https://pctf.competitivecyber.club/challenges 目次 目次 crypto [Solved] idk cipher (100点) [Solved] Bigger is Better (100点) [Solved] Hard to Implement (190点) [Solved] Bit by Bit (354点) [未] One for you, one for me (390点) [未] High Roller (390点) [未] Protected Console (462点) [未] T…