CryptoHack
A fun free platform for learning modern cryptography
Break Crypto
Get your hands dirty and learn about modern cryptographic protocols by solving a series of interactive puzzles and challenges.
Level Up
Earn points by solving challenges. Finish categories to earn trophies and gain levels to track your progress. Can you reach the top of the scoreboard?
Fresh Challenges
We are constantly creating new challenges to keep your crypto knowledge up to date. Expect exciting brainteasers and whole new categories as the site continues to grow.
New Challenges
| RSA or HMAC? Part 2 | Crypto on the Web | 100 |
| Roll your Own | Mathematics | 90 |
| Dancing Queen | Block Ciphers | 120 |
| SSH Keys | General | 35 |
| LFSR Destroyer | Misc | 250 |
Weekly Top Users
| #1 | winderica | 4965 |
| #2 | y7 | 3250 |
| #3 | GustavoX22 | 2520 |
| #4 | goober | 2380 |
| #5 | hack_at_ash | 1485 |
Recent Solves
| Network Attacks | Cahid | |
| Network Attacks | otreble | |
| Great Snakes | Cahid | |
| No Way JOSE | nomindart | |
| Great Snakes | otreble |
Recent Solutions
| Endless Emails | anantarupa_1801 | 0 |
| Encoding Challenge | Game0v3r | 0 |
| Gotta Go Fast | _ph03n1x | 0 |
| You either know, XOR you don't | nopfault | 0 |
| Favourite byte | nopfault | 0 |