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CTF

Created: 1/12/2026 Updated: 1/12/2026

CTFs (short for capture the flag) are a type of computer security competition. Contestants are presented with a set of challenges which test their creativity, technical (and googling) skills, and problem-solving ability. Challenges usually cover a number of categories, and when solved, each yields a string (called a flag) which is submitted to an online scoring service. CTFs are a great way to learn a wide array of computer security skills in a safe, legal environment, and are hosted and played by many security groups around the world for fun and practice.

There are a wide range of skills tested by CTFs, but usually challenges are categorized as one of these problem types.

  • General Skills
    • Scripting - Shell Commands
    • Operating System Specific
    • System Administration
  • CTF Cryptography
  • Forensics
    • File
    • Filesystem
    • Memory
    • Network
  • Web Exploitation
  • Uncategorized / Miscellaneous
  • Reverse Engineering
  • Binary Exploitation

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