Capture The Flag(CTF) are computer security/hacking competitions which generally consist of participants breaking, investigating, reverse engineering and doing anything they can to reach the end goal, a “flag” which is usually found as a string of text.

A CTF is a system of increasingly-difficult challenges that can’t be too easy or too hard. A well-designed CTF teaches all of the participants stuff that they didn’t know, no matter how far they get and what skills they came in with. Designing a good CTF is difficult.

CTF’s are a competition. Organizing CTF’s involve the following:

  • Registering teams
  • providing login pages
  • building the systems

With Facebook open-sourcing their CTF-hosting platform, along with a few starter challenges. Anyone can now host CTF’s with minimal effort.

CTF Time is another great resource to find archived CTF’s and other related information.


Facebook CTF Github
CTF Resources
CTF Time

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