| Date | User | Challenge | Score |
| BETTER | Base64 | 10 | |
| assakaf | Diffusion through Permutation | 30 | |
| deyanix | Stream of Consciousness | 80 | |
| suruike | Finding Flags | 2 | |
| drzejus | Export-grade | 100 | |
| SpyrosKonidas | JWT Secrets | 25 | |
| last_rite_3rd | ASCII | 5 | |
| zirajs | Extended GCD | 20 | |
| last_rite_3rd | Network Attacks | 5 | |
| SpyrosKonidas | No Way JOSE | 20 | |
| assakaf | Confusion through Substitution | 25 | |
| zirajs | Greatest Common Divisor | 15 | |
| Mihafil746 | ECB CBC WTF | 55 | |
| ubercustomer1337 | Confusion through Substitution | 25 | |
| SpyrosKonidas | JWT Sessions | 10 | |
| Piterbul | Favourite byte | 20 | |
| Baeco | Null or Never | 100 | |
| zirajs | Lemur XOR | 40 | |
| xXx_makarrr_xXx | Modular Binomials | 80 | |
| SpyrosKonidas | Token Appreciation | 5 | |
| zirajs | You either know, XOR you don't | 30 | |
| Mihafil746 | Modes of Operation Starter | 15 | |
| namtran1305 | Modular Exponentiation | 10 | |
| zreddx | Modular Arithmetic 2 | 20 | |
| genranglnhh | Modular Arithmetic 1 | 20 | |
| Mihafil746 | Diffusion through Permutation | 30 | |
| assakaf | Round Keys | 20 | |
| zreddx | Modular Arithmetic 1 | 20 | |
| genranglnhh | Extended GCD | 20 | |
| 3amo_DA7Y | Modular Inverting | 25 | |
| genranglnhh | Greatest Common Divisor | 15 | |
| zirajs | Favourite byte | 20 | |
| mkrajevsky | Private Keys | 20 | |
| mkrajevsky | Euler's Totient | 20 | |
| MakarovKardevsky | Everything is Big | 70 | |
| genranglnhh | Lemur XOR | 40 | |
| assakaf | Structure of AES | 15 | |
| 3amo_DA7Y | Modular Arithmetic 2 | 20 | |
| Mihafil746 | Confusion through Substitution | 25 | |
| mkrajevsky | Public Keys | 15 | |
| zirajs | XOR Properties | 15 | |
| mkrajevsky | Modular Exponentiation | 10 | |
| xXx_makarrr_xXx | Adrien's Signs | 80 | |
| zirajs | XOR Starter | 10 | |
| zirajs | Encoding Challenge | 40 | |
| MakarovKardevsky | Modulus Inutilis | 50 | |
| IoaMertz | Private Keys | 20 | |
| nums | Base64 | 10 | |
| MakarovKardevsky | Salty | 20 | |
| 3amo_DA7Y | Modular Arithmetic 1 | 20 |
You are now level Current level