| Date | User | Challenge | Score |
| 3nz0 | Greatest Common Divisor | 15 | |
| zCelestial | Great Snakes | 3 | |
| cagser | Private Keys | 20 | |
| varna | ASCII | 5 | |
| vbaned | Public Keys | 15 | |
| varna | Great Snakes | 3 | |
| bob123123 | ASCII | 5 | |
| bob123123 | Great Snakes | 3 | |
| Regedit | Hex | 5 | |
| bob123123 | Finding Flags | 2 | |
| varna | Finding Flags | 2 | |
| vbaned | Modular Exponentiation | 10 | |
| labyrinth0 | XOR Properties | 15 | |
| AnonymeA | ASCII | 5 | |
| AnonymeA | Great Snakes | 3 | |
| AnonymeA | Finding Flags | 2 | |
| zCelestial | Finding Flags | 2 | |
| xingchi | MD0 | 80 | |
| RicMani | Round Keys | 20 | |
| canfshmicrowave | Parameter Injection | 60 | |
| hack_use_math | Size and Basis | 15 | |
| hack_use_math | Vectors | 10 | |
| edlebg | Finding Flags | 2 | |
| xingchi | PriMeD5 | 100 | |
| suedumbrella | Hex | 5 | |
| MrMazury | You either know, XOR you don't | 30 | |
| canfshmicrowave | Deriving Symmetric Keys | 40 | |
| cryptobelix | Great Snakes | 3 | |
| cryptobelix | Finding Flags | 2 | |
| canfshmicrowave | Computing Shared Secrets | 30 | |
| RicMani | Structure of AES | 15 | |
| canfshmicrowave | Computing Public Values | 25 | |
| MrMazury | Favourite byte | 20 | |
| canfshmicrowave | Generators of Groups | 20 | |
| xingchi | Hash Stuffing | 50 | |
| bogster | Network Attacks | 5 | |
| jscornelius | Resisting Bruteforce | 10 | |
| MrMazury | XOR Properties | 15 | |
| Carole | Hex | 5 | |
| suedumbrella | ASCII | 5 | |
| Carole | ASCII | 5 | |
| numberenjoyer | Bytes and Big Integers | 10 | |
| SKotea | Base64 | 10 | |
| silvereagle429 | Greatest Common Divisor | 15 | |
| Carole | Great Snakes | 3 | |
| xingchi | Collider | 50 | |
| rabb1t | Quadratic Residues | 25 | |
| suedumbrella | Great Snakes | 3 | |
| Zaron | Hex | 5 | |
| suedumbrella | Finding Flags | 2 |
You are now level Current level