The purpose of this project is to keep an archive of practical CTF challenges and practice sites.
* Reverse Engineering: [Tghack Space Academy](https://tghack.no/page/Tutorial) * Pwn: [Root-Me](https://www.root-me.org/) * Cryptography: [CryptoHack](https://cryptohack.org/) * Web: [Hacker101](https://ctf.hacker101.com/)- Angstrom CTF
- Checkpoint CTF
- ctflearn
- Google CTF
- HackCTF
- Hellbound hackers
- HXP 2018
- OverTheWire
- picoCTF
- Praetorian
- Purdue CTF
- RingZer0 CTF
- CSAW 365
- TGhack
- UIUC CTF
- USF CTF
- X-CTF