Oct 15, 2024 · This guide was written and maintained by the OSIRIS Lab at New York University in collaboration with CTFd. In this handbook you'll learn the basics™ behind the methodologies and …

In computer security, Capture the Flag (CTF) is an exercise in which participants attempt to find text strings, called "flags", which are secretly hidden in purposefully vulnerable programs or websites. …

Dec 8, 2025 · Capture The Flag (CTF) competitions are hands-on security challenges where you solve puzzles to find hidden "flags." They're how many security professionals first learned to hack, and …

Jun 26, 2025 · A practical cheatsheet, checklist, and guide for CTF (Capture The Flag) competitions, covering essential techniques, tools, and tips for all major challenge categories.

picoCTF is a free computer security education program with original content built on a capture-the-flag framework created by security and privacy experts at Carnegie Mellon University.

Jul 12, 2025 · A CTF stands for Capture the Flag, a game in which players put their skills to practice to solve problems or break into an opponent's system. Below are different types of CTFs -

In a CTF game, you and several other hackers will be given a piece of software, a web application, a virtual machine, or a virtualized network as your target. Your objective is to find all of the hidden flags …

"New Year CTF 2026" is publically votable. Dec. 31, 2025, 4:02 a.m. Team "4 ton slab of stone" added as an alias to "b01lers". Dec. 31, 2025, 4 a.m. Team "Goon Knights" added as an alias to "z0d1ak". …

CTF (Capture The Flag) started from DEFCON CTF, a competitive game among computer security enthusiasts, originally hosted in 1996. CTF covers a wide range of fields.

Jun 5, 2025 · CTF stands for Capture The Flag, a game rooted in cybersecurity where participants solve challenges to find hidden “flags.” These flags are usually strings of text (like FLAG {example123}) …