Challenge list
General SkillsLevel 1★☆☆☆☆01. First Steps - Binary and Hexadecimal
In the security world, binary and hexadecimal are commonly used. In this challenge, convert hexadecimal to ASCII…
Network SecurityLevel 1★☆☆☆☆08. Network Basics - Learn Port Numbers
Networks use port numbers to identify services. For example, a web server (HTTP) usually uses port 80, and encrypted…
General SkillsLevel 1★☆☆☆☆10. Security Basics - Ethics and Rules
To become a white hat hacker, knowledge of ethics and laws is just as important as technical skills. In this…
Digital ForensicsLevel 1★☆☆☆☆12. Identify File Signatures
Files contain identification information called "magic bytes" at the beginning. Even if the extension is disguised,…
Digital ForensicsLevel 1★☆☆☆☆13. Hidden Metadata in Images
Photos and images contain metadata called EXIF. This metadata records shooting date, camera info, GPS coordinates,…
Digital ForensicsLevel 1★☆☆☆☆15. Extract Strings from Binary
Binary files (executables, etc.) contain human-readable strings. Passwords, URLs, error messages, and other hints can…