CTFHub

BUUCTF，北京联合大学

腾讯游戏安全

Bugku CTF

There are a lot of Capture The Flag (CTF) competitions in our days, some of them have excelent tasks, but in most cases they're forgotten just after the CTF finished

XCTF联赛，网络安全竞赛，信息安全，CTF赛事交流，信息安全竞赛学习，白帽黑客论坛，网络安全人才聚集地，白帽黑客大本营