| Date | User | Challenge | Score |
| ninebytes | XOR Starter | 10 | |
| D1533 | RRSSAA (ECSC 2023 (Norway)) | 0 | |
| AsmaaElsheikh | Finding Flags | 2 | |
| catgamer314 | ASCII | 5 | |
| sgrenz | Legendre Symbol | 35 | |
| Timmeke_ | Favourite byte | 20 | |
| catgamer314 | Great Snakes | 3 | |
| encrypjim | Bytes and Big Integers | 10 | |
| catgamer314 | Finding Flags | 2 | |
| ninebytes | Bytes and Big Integers | 10 | |
| GlasZilla | RSA Decryption | 20 | |
| CactusAcolyte | Finding Flags | 2 | |
| encrypjim | Base64 | 10 | |
| ninebytes | Base64 | 10 | |
| Timmeke_ | XOR Properties | 15 | |
| GlasZilla | Private Keys | 20 | |
| encrypjim | Hex | 5 | |
| encrypjim | ASCII | 5 | |
| ninebytes | Hex | 5 | |
| GlasZilla | Euler's Totient | 20 | |
| ninebytes | ASCII | 5 | |
| GlasZilla | Public Keys | 15 | |
| ossaji | Finding Flags | 2 | |
| GlasZilla | Modular Exponentiation | 10 | |
| Timmeke_ | XOR Starter | 10 | |
| encrypjim | Great Snakes | 3 | |
| ninebytes | Great Snakes | 3 | |
| encrypjim | Finding Flags | 2 | |
| ninebytes | Finding Flags | 2 | |
| moystee | Diffusion through Permutation | 30 | |
| sgrenz | Quadratic Residues | 25 | |
| sgrenz | Modular Inverting | 25 | |
| Timmeke_ | Bytes and Big Integers | 10 | |
| kilpom | Diffusion through Permutation | 30 | |
| sgrenz | Modular Arithmetic 2 | 20 | |
| Timmeke_ | Base64 | 10 | |
| Timmeke_ | Hex | 5 | |
| sgrenz | Modular Arithmetic 1 | 20 | |
| sgrenz | Extended GCD | 20 | |
| Timmeke_ | ASCII | 5 | |
| Timmeke_ | Great Snakes | 3 | |
| Timmeke_ | Finding Flags | 2 | |
| kuroguro | Favourite byte | 20 | |
| moystee | Confusion through Substitution | 25 | |
| ty4115 | Passwords as Keys | 50 | |
| abdulkadirmood | XOR Starter | 10 | |
| UrLastWish | RSA Decryption | 20 | |
| moystee | Round Keys | 20 | |
| DuckMaster | Infinite Descent | 50 | |
| abdulkadirmood | Bytes and Big Integers | 10 |
You are now level Current level