| Date | User | Challenge | Score |
| Bonfacevulu | Bringing It All Together | 50 | |
| lauretti | ECB Oracle | 60 | |
| Bonfacevulu | Diffusion through Permutation | 30 | |
| Rrahel_Alemu | XOR Starter | 10 | |
| B3AC0N | Base64 | 10 | |
| 169819 | Diffusion through Permutation | 30 | |
| postQuantum | Modular Inverting | 25 | |
| Bonfacevulu | Confusion through Substitution | 25 | |
| jimmy20180130 | Everything is Big | 70 | |
| 169819 | Confusion through Substitution | 25 | |
| minimini | Base64 | 10 | |
| Dexecuting | ECB Oracle | 60 | |
| 169819 | Round Keys | 20 | |
| fireicegun | ZKP Introduction | 5 | |
| Rrahel_Alemu | Bytes and Big Integers | 10 | |
| Bonfacevulu | Round Keys | 20 | |
| postQuantum | Modular Arithmetic 1 | 20 | |
| Bonfacevulu | Structure of AES | 15 | |
| postQuantum | Extended GCD | 20 | |
| jimmy20180130 | Modulus Inutilis | 50 | |
| postQuantum | Greatest Common Divisor | 15 | |
| Bonfacevulu | Resisting Bruteforce | 10 | |
| 169819 | Structure of AES | 15 | |
| postQuantum | Modular Arithmetic 2 | 20 | |
| Bonfacevulu | Keyed Permutations | 5 | |
| kuclux | CTRIME | 70 | |
| minimini | Hex | 5 | |
| karasec | Quadratic Residues | 25 | |
| amama_noor | Greatest Common Divisor | 15 | |
| minimini | ASCII | 5 | |
| minimini | Great Snakes | 3 | |
| minimini | Finding Flags | 2 | |
| B3AC0N | Hex | 5 | |
| karasec | Modular Inverting | 25 | |
| Rrahel_Alemu | Base64 | 10 | |
| Doemae | Passwords as Keys | 50 | |
| moaoifff | Great Snakes | 3 | |
| B3AC0N | ASCII | 5 | |
| richy | Great Snakes | 3 | |
| richy | Finding Flags | 2 | |
| Rrahel_Alemu | Hex | 5 | |
| Manorom | Modular Inverting | 25 | |
| moaoifff | Finding Flags | 2 | |
| Manorom | Modular Arithmetic 2 | 20 | |
| Manorom | Modular Arithmetic 1 | 20 | |
| B3AC0N | Great Snakes | 3 | |
| Manorom | Extended GCD | 20 | |
| vanMjnh | Authenticated Handshake | 40 | |
| B3AC0N | Finding Flags | 2 | |
| Doemae | Modes of Operation Starter | 15 |
You are now level Current level