| Date | User | Challenge | Score |
| tera | Backpack Cryptography | 120 | |
| sutterismine | Adrien's Signs | 80 | |
| adrine | Greatest Common Divisor | 15 | |
| nikosn | Round Keys | 20 | |
| VThisZomzom | Modular Arithmetic 1 | 20 | |
| CoffeeRex | Base64 | 10 | |
| Mitre | Lemur XOR | 40 | |
| aldiad | Extended GCD | 20 | |
| esklibu666 | You either know, XOR you don't | 30 | |
| CoffeeRex | Hex | 5 | |
| nikosn | Structure of AES | 15 | |
| stamatia_psalti | Euler's Totient | 20 | |
| silt | XOR Starter | 10 | |
| vasilikichar | Greatest Common Divisor | 15 | |
| elesquina | Encoding Challenge | 40 | |
| esklibu666 | Favourite byte | 20 | |
| nikosn | Resisting Bruteforce | 10 | |
| aldiad | Greatest Common Divisor | 15 | |
| esklibu666 | XOR Properties | 15 | |
| adrine | You either know, XOR you don't | 30 | |
| vasilikichar | Lemur XOR | 40 | |
| silt | Bytes and Big Integers | 10 | |
| nikosn | Keyed Permutations | 5 | |
| mary12555488 | Token Appreciation | 5 | |
| Kriz | ZKP Introduction | 5 | |
| vasilikichar | You either know, XOR you don't | 30 | |
| CoffeeRex | ASCII | 5 | |
| _Zer0__ | Great Snakes | 3 | |
| monvector | XOR Properties | 15 | |
| Kriz | Vote for Pedro | 150 | |
| DJB | Hex | 5 | |
| esklibu666 | XOR Starter | 10 | |
| 0x00696e6964756f | RSA or HMAC? Part 2 | 100 | |
| stamatia_psalti | Public Keys | 15 | |
| Kruszyna | Let's Decrypt | 80 | |
| _Zer0__ | Finding Flags | 2 | |
| Giorgio_Gui | Confusion through Substitution | 25 | |
| silt | Base64 | 10 | |
| marvas | JWT Sessions | 10 | |
| nikosn | Secure Protocols | 5 | |
| DJB | ASCII | 5 | |
| vasilikichar | Favourite byte | 20 | |
| TasosB | Transparency | 50 | |
| VThisZomzom | Extended GCD | 20 | |
| adrine | Favourite byte | 20 | |
| esklibu666 | Bytes and Big Integers | 10 | |
| marvas | Token Appreciation | 5 | |
| DJB | Great Snakes | 3 | |
| aldiad | You either know, XOR you don't | 30 | |
| vasilikichar | XOR Starter | 10 |
You are now level Current level