This year, HITB-XCTF GSEC Capture the Flag contest will again be co-organized by HITB and XCTF League from China! An Attack & Defense Style CTF competition is planned for the 30th and 31st of August alongside the conference. To select the best teams to play onsite, HITB and XCTF will organize a qualification competition during HITBSecConf2018 – Amsterdam. The qualification game is a jeopardy-style online Capture The Flag Competition, sponsored by JD Security with platform support by CyberPeace. The challenges for this qualification round is authored by the Champion Team of the 3rd XCTF League Finals — FlappyPig from China! The qualification competition is hosted online and opened to all participants around the world. Teams can compete from any location. No restriction on the number of participants of any team. The Top 15 teams will be qualify for a spot to compete at the HITB-XCTF GSEC CTF 2018 Finals (30th – 31st of August).