| Date | User | Challenge | Score |
| reksavertx | Favourite byte | 20 | |
| Strokkurgaming | Resisting Bruteforce | 10 | |
| DraSoGo | Confusion through Substitution | 25 | |
| Samamahassan | You either know, XOR you don't | 30 | |
| lichunsheng | XOR Properties | 15 | |
| DraSoGo | Round Keys | 20 | |
| fireicegun | Authenticated Handshake | 40 | |
| PatriciahMbua | Bringing It All Together | 50 | |
| Strokkurgaming | Keyed Permutations | 5 | |
| moranqy | Bytes and Big Integers | 10 | |
| DraSoGo | Structure of AES | 15 | |
| tflyer | Background Reading | 5 | |
| maksushka | Modes of Operation Starter | 15 | |
| Samamahassan | Network Attacks | 5 | |
| luwofi | Quadratic Residues | 25 | |
| M1ntcndt1on | Finding Flags | 2 | |
| moranqy | Base64 | 10 | |
| ClaraW | ECB Oracle | 60 | |
| luwofi | Modular Inverting | 25 | |
| svasileiadis | XOR Starter | 10 | |
| reksavertx | XOR Properties | 15 | |
| Samamahassan | Favourite byte | 20 | |
| PatriciahMbua | Diffusion through Permutation | 30 | |
| moranqy | Hex | 5 | |
| luwofi | Modular Arithmetic 2 | 20 | |
| brahimtch | Modular Exponentiation | 10 | |
| maksushka | Bringing It All Together | 50 | |
| luwofi | Modular Arithmetic 1 | 20 | |
| moranqy | ASCII | 5 | |
| svasileiadis | Encoding Challenge | 40 | |
| luwofi | Extended GCD | 20 | |
| luwofi | Greatest Common Divisor | 15 | |
| Urvi | Bean Counter | 60 | |
| moranqy | Great Snakes | 3 | |
| Samamahassan | XOR Properties | 15 | |
| moranqy | Finding Flags | 2 | |
| gyul_ | XOR Starter | 10 | |
| Kvikimart | Base64 | 10 | |
| Username965 | Great Snakes | 3 | |
| Urvi | Symmetry | 50 | |
| DraSoGo | Resisting Bruteforce | 10 | |
| Kvikimart | Hex | 5 | |
| bodo | Finding Flags | 2 | |
| l3th4l | Find the Lattice | 100 | |
| Urvi | Flipping Cookie | 60 | |
| Kvikimart | ASCII | 5 | |
| DraSoGo | Keyed Permutations | 5 | |
| gyul_ | Bytes and Big Integers | 10 | |
| Kvikimart | Great Snakes | 3 | |
| Urvi | ECB CBC WTF | 55 |
You are now level Current level