CryptoHack
A fun 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
| Modular Square Root | Mathematics | 35 |
| Broken RSA | Mathematics | 100 |
| Real Eisenstein | Mathematics | 150 |
| Keyed Permutations | Block Ciphers | 5 |
| Structure of AES | Block Ciphers | 15 |
Weekly Top Users
| #1 | p0fs | 4145 |
| #2 | hellman | 2845 |
| #3 | Cryptanalyse | 2650 |
| #4 | gf128 | 2370 |
| #5 | Dmit | 1840 |
Recent Solves
| XOR Starter | lbm | |
| Everything is Big | wilson | |
| Square Eyes | WeiLiToh | |
| Finding Flags | alekyou | |
| CERTainly not | Maneea |
Recent Solutions
| ECB Oracle | Retr0id | 0 |
| Lemur XOR | noillex | 0 |
| CERTainly not | medvedisko | 0 |
| RSA Starter 2 | 0xThxmxs | 0 |
| Privacy-Enhanced Mail? | ant400468 | 0 |