You can clear all the challenges of the international hacking competition SquareCTF (2018~2019). Broaden your senses and perspectives on IT and security by experiencing various challenges!

You can clear all the challenges of the hacking competition SquareCTF (2017).

Episodes from the year I started from scratch to stand on my own after quitting my dream job.

You can clear all the preliminary challenges of the hacking competition DIMICTF (2019).

While tackling Nebula, a wargame designed to develop system hacking skills, I have included a complete translation and solutions for all challenges, including the setup of the practice environment from start to finish. Additionally, you can acquire the computer science knowledge required for each challenge.

Covering the content of WebGoat, a classic web hacking wargame, this resource includes full translations and solutions for every lesson and challenge from start to finish. It provides everything from setting up the practice environment to the tools and data required to solve the challenges.

You can now enjoy more freedom in cyberspace than ever before.

This is a free special lecture that can help you strengthen your information security and personal information protection capabilities.

If you have ever felt attracted to someone typing mysterious Linux commands on a black screen but felt lost on where or how to start, this course can help you.