SQUARE

SquareCTF - Capture the Flag competitions, hosted by Square, where teams compete to solve security-related challenges for points... Our CTFs are meant to be fun for both first time and experienced players. We create an assortment of easy, medium, and hard puzzles... We have a list of tips that should help you get started. Some of our previous years' challenges and their solutions are made available to you. You are free to use the content on this site as you please - you may even flatter us by copying bits and pieces for your own event!

Also known as: Square CTF, Square, Inc.