| Date | User | Challenge | Score |
| matibbb232 | Quadratic Residues | 25 | |
| AsterExcrisys | RSA Decryption | 20 | |
| Mathys | Resisting Bruteforce | 10 | |
| luffy84 | Token Appreciation | 5 | |
| MarioDarco | Manyprime | 40 | |
| jerome_helmo | Diffusion through Permutation | 30 | |
| Bouboudeur | ASCII | 5 | |
| LePcASofia | Favourite byte | 20 | |
| AngelBus | Favourite byte | 20 | |
| Q240016 | Keyed Permutations | 5 | |
| Mathys | Keyed Permutations | 5 | |
| guapitang | Finding Flags | 2 | |
| sewulas | Roll your Own | 125 | |
| 01180766 | Proofs of Knowledge | 20 | |
| fynooc | XOR Properties | 15 | |
| Sars | Euler's Totient | 20 | |
| MadRat_0 | Sharks on the Wire | 10 | |
| Q240016 | XOR Properties | 15 | |
| Skarn | CTRIME | 70 | |
| MadRat_0 | Secure Protocols | 5 | |
| Bouboudeur | Great Snakes | 3 | |
| AngelBus | XOR Properties | 15 | |
| jschneiders | Confusion through Substitution | 25 | |
| Bouboudeur | Finding Flags | 2 | |
| florentMZL | Hash Stuffing | 50 | |
| luffy84 | Successive Powers | 60 | |
| LePcASofia | XOR Properties | 15 | |
| AsterExcrisys | Private Keys | 20 | |
| AngelBus | XOR Starter | 10 | |
| jerome_helmo | Confusion through Substitution | 25 | |
| jschneiders | Round Keys | 20 | |
| AsterExcrisys | Euler's Totient | 20 | |
| codeKiller22 | Finding Flags | 2 | |
| Sars | Public Keys | 15 | |
| Octopuss6 | XOR Starter | 10 | |
| starwalkinglty | Successive Powers | 60 | |
| fynooc | XOR Starter | 10 | |
| AsterExcrisys | Public Keys | 15 | |
| jerome_helmo | Round Keys | 20 | |
| Baboon | Diffusion through Permutation | 30 | |
| tstbp | Diffusion through Permutation | 30 | |
| AsterExcrisys | Modular Exponentiation | 10 | |
| Octopuss6 | Bytes and Big Integers | 10 | |
| collemi | Round Keys | 20 | |
| Q240016 | XOR Starter | 10 | |
| madhav_anand_ | Smooth Criminal | 60 | |
| Mathys | XOR Starter | 10 | |
| LePcASofia | XOR Starter | 10 | |
| Bouboudeur | Structure of AES | 15 | |
| Jsuisperdu | Round Keys | 20 |
You are now level Current level