During the weekend of 6-8th of July, our CTF team – Dragon Sector – played in an invite-only competition called WCTF, held in Beijing. The other participants were top-tier groups from around the world (e.g. Shellphish, ESPR, LC↯BC or Tokyo Westerns), and the prize pool of the contest was a stunning $100,000 USD. One particularly unique rule of the CTF was that the challenges were prepared by the teams themselves and not the organizers. Each of the 10 teams was obligated to provide t...