| Date | User | Challenge | Score |
| lingling | Round Keys | 20 | |
| froggyhh56 | Great Snakes | 3 | |
| Banana_Babanana | Public Keys | 15 | |
| froggyhh56 | Finding Flags | 2 | |
| lingling | Structure of AES | 15 | |
| tr3z40 | Favourite byte | 20 | |
| francois | Mixed Up | 120 | |
| tr3z40 | XOR Properties | 15 | |
| shadowguy | Lemur XOR | 40 | |
| perry_platypus | Adrien's Signs | 80 | |
| stormrotss | Salty | 20 | |
| RestNPZ | Hex | 5 | |
| RestNPZ | ASCII | 5 | |
| nathaniel_nolife | Greatest Common Divisor | 15 | |
| shadowguy | You either know, XOR you don't | 30 | |
| Snoc | Adrien's Signs | 80 | |
| DeFaDeDe | ASCII | 5 | |
| DeFaDeDe | Great Snakes | 3 | |
| _______u | Marin's Secrets | 50 | |
| ion9368 | Working with Fields | 10 | |
| Baeco | Curveball | 100 | |
| DeFaDeDe | Finding Flags | 2 | |
| Saltensity | Montgomery's Ladder | 40 | |
| stormrotss | Manyprime | 40 | |
| sai09naidu89 | Square Eyes | 35 | |
| wildxah | ASCII | 5 | |
| Malekith | Transparency | 50 | |
| lingling | Resisting Bruteforce | 10 | |
| tr3z40 | XOR Starter | 10 | |
| wildxah | Great Snakes | 3 | |
| lingling | Keyed Permutations | 5 | |
| AllFine | Confusion through Substitution | 25 | |
| Malekith | SSH Keys | 35 | |
| Malekith | CERTainly not | 30 | |
| stormrotss | Square Eyes | 35 | |
| ion9368 | Modulus Inutilis | 50 | |
| ion9368 | Salty | 20 | |
| Malekith | Privacy-Enhanced Mail? | 25 | |
| LBN789 | XOR Starter | 10 | |
| ion9368 | Manyprime | 40 | |
| Ekroop | Merkle Trees | 25 | |
| tr3z40 | Base64 | 10 | |
| Malekith | Modular Inverting | 25 | |
| tr3z40 | Hex | 5 | |
| Malekith | Modular Arithmetic 2 | 20 | |
| Banana_Babanana | Modular Exponentiation | 10 | |
| AllFine | Round Keys | 20 | |
| bemartian | Resisting Bruteforce | 10 | |
| tr3z40 | ASCII | 5 | |
| ion9368 | Monoprime | 30 |
You are now level Current level