A capture the flag (CTF) contest is a special kind of cybersecurity competition designed to challenge its participants to solve computer security problems and/or capture and defend computer systems. CTF competitions have elevated from their humble roots to reach sport-level status, with thousands of individual games and leagues now taking place every year across the globe. The IRISSCON 2016 CTF competition is one of the largest events of its kind in Ireland. The competition is a staple of the annual cybersecurity conference.”]
Source: https://securityintelligence.com/behind-the-scenes-at-a-capture-the-flag-ctf-competition/