Crate-CTF 2025

Crate-CTF is an annual Capture The Flag (CTF) competition organised by the Swedish Defence Research Agency in collaboration with the Swedish Armed Forces, designed to introduce high school and university students to the field of cybersecurity. After having over 1000 participants last year we return for our sixth CTF, with challenges for all skill levels from beginners to seasoned CTF players. The challenges are categorised into web exploitation, reverse engineering, binary exploitation, cryptography, forensics, OSINT, networking and the all-encompassing "other". While the event will be conducted in Swedish, international participants are also welcome to join (using translation tools as needed). Communication with challenge authors and administrators can be conducted in English.