Capture The Flag Events

HackingForSoju managed to pull themselves out of their (soju) bottles to scrape together yet another CTF event. Come guess our flags, OSINT our organizers, and if you qualify, come get drunk with us at our finals event in Stockholm, Sweden.

Crypto CTF is an online competition for hackers to test, evaluate, and expand their skills in exploiting cryptography. In this CTF, we will provide various crypto challenges that focus on modern cryptography techniques. </br> </br> All crypto lovers are most welcome! </br> </br> Crypto CTF is a response to the longstanding complaints by CTF participants about the crypto challenges in CTF contests. In this brand-new tournament, we aim to provide crypto enthusiasts with fun and challenging pure crypto tasks that will truly test their passion for cryptography. </br> </br> Each task will be based on a specific cryptographic primitive or will involve a direct application of cryptography in other fields. </br> </br> The organizers of these tournaments generously offer their knowledge and skills to design original Crypto tasks and challenges for similar contests. </br> </br> Long Live Crypto :)

Welcome to the AMSI CTF 2025, a cybersecurity competition organized by the Association of Master Sécurité Informatique (AMSI) of Sorbonne Université. This exciting event brings together "la crème de la crème" of cybersecurity students to test their skills in a series of challenging security puzzles and scenarios. On June 13-14, participants will tackle various challenges across multiple categories including cryptography, web, reverse engineering, forensics, and more. </br></br> Thanks to the sponsors : Orange Cyberdefense, Quakslab, Root-Me Pro, RedBull, and Aforp.

The Goldrush Gauntlet CTF 2025 is a Jeopardy-style Capture-The-Flag competition for teams of 4 that will take place online on June 7th-8th, 2025.

We saw that you had a lot of fun during the previous Training CTF, and based on the Discord discussions, many of you learned a lot new skills. Now it’s time for the real deal.

Organized by @Vidar, @CNSS, @L-Team, the 6th D^3CTF is coming! </br> D^3 means "the cube of Dian", i.e., the cube of "electronic" in Chinese. As the three teams co-hosting this CTF game come from three "University of Electronic" in China (UESTC, Xidian, HDU). </br> Have fun! </br> Sponsorship: Infrastructure: Sponsored by goo.gle/ctfsponsorship. For more details, visit http://goo.gle/ctfsponsorship. </br> Prizes: Thanks to Binary Ninja for sponsoring the prizes. Explore their offerings at https://binary.ninja/. </br>