| Date | User | Challenge | Score |
| K3nm4 | Great Snakes | 3 | |
| virginicquez | XOR Properties | 15 | |
| Momomomo0625 | XOR Properties | 15 | |
| K3nm4 | Finding Flags | 2 | |
| shynnevilla | Noise Cheap | 90 | |
| backpack | Network Attacks | 5 | |
| thomymy | Base64 | 10 | |
| luwofi | JSON in JSON | 40 | |
| thomymy | Hex | 5 | |
| virginicquez | XOR Starter | 10 | |
| luwofi | RSA or HMAC? | 35 | |
| thomymy | ASCII | 5 | |
| yideng | Network Attacks | 5 | |
| thomymy | Great Snakes | 3 | |
| thomymy | Finding Flags | 2 | |
| sikanderalii | Base64 | 10 | |
| backpack | You either know, XOR you don't | 30 | |
| Mikayn | ECB CBC WTF | 55 | |
| Rander | Modular Inverting | 25 | |
| p3rm1t | Greatest Common Divisor | 15 | |
| Rander | Modular Arithmetic 2 | 20 | |
| Rander | Modular Arithmetic 1 | 20 | |
| sikanderalii | Hex | 5 | |
| Rander | Extended GCD | 20 | |
| Tryffel | Modular Binomials | 80 | |
| Rander | Encoding Challenge | 40 | |
| sikanderalii | ASCII | 5 | |
| dachDelat | You either know, XOR you don't | 30 | |
| Rander | Greatest Common Divisor | 15 | |
| Tryffel | Adrien's Signs | 80 | |
| luwofi | JWT Secrets | 25 | |
| Tryffel | Chinese Remainder Theorem | 40 | |
| sikanderalii | Great Snakes | 3 | |
| sikanderalii | Finding Flags | 2 | |
| goostty | Base64 | 10 | |
| JacobLu3141 | Passwords as Keys | 50 | |
| goostty | Hex | 5 | |
| dachDelat | Favourite byte | 20 | |
| syadidd | XOR Starter | 10 | |
| Dyner | Modular Arithmetic 2 | 20 | |
| goostty | ASCII | 5 | |
| ADfsf | Modular Arithmetic 1 | 20 | |
| backpack | Favourite byte | 20 | |
| goostty | Great Snakes | 3 | |
| gyul_ | Modular Inverting | 25 | |
| Dyner | Modular Arithmetic 1 | 20 | |
| goostty | Finding Flags | 2 | |
| luwofi | No Way JOSE | 20 | |
| backpack | XOR Properties | 15 | |
| dachDelat | XOR Properties | 15 |
You are now level Current level