| Date | User | Challenge | Score |
| starmie3700 | Modes of Operation Starter | 15 | |
| NekoRolly | ASCII | 5 | |
| JCooker | Resisting Bruteforce | 10 | |
| NekoRolly | Great Snakes | 3 | |
| starmie3700 | Bringing It All Together | 50 | |
| paulihno15 | RSA Signatures | 25 | |
| NekoRolly | Finding Flags | 2 | |
| denarzai | XOR Starter | 10 | |
| JCooker | Keyed Permutations | 5 | |
| Adrinn | Round Keys | 20 | |
| MrRed | Base64 | 10 | |
| 1502dthw | Finding Flags | 2 | |
| Fatiimaaa | Favourite byte | 20 | |
| petr | Modular Binomials | 80 | |
| ahmadnaghibi | Round Keys | 20 | |
| MrRed | Hex | 5 | |
| Jackhany1024 | Transparency | 50 | |
| Jackhany1024 | SSH Keys | 35 | |
| YUMI_ddd | Lemur XOR | 40 | |
| denarzai | Bytes and Big Integers | 10 | |
| Vlad_Valar | ASCII | 5 | |
| Fatiimaaa | XOR Properties | 15 | |
| Vlad_Valar | Network Attacks | 5 | |
| Jackhany1024 | CERTainly not | 30 | |
| MrRed | ASCII | 5 | |
| Jackhany1024 | Privacy-Enhanced Mail? | 25 | |
| starmie3700 | Diffusion through Permutation | 30 | |
| denarzai | Base64 | 10 | |
| MrRed | Great Snakes | 3 | |
| Jackhany1024 | Modular Inverting | 25 | |
| Vlad_Valar | Great Snakes | 3 | |
| Jackhany1024 | Modular Arithmetic 2 | 20 | |
| Jackhany1024 | Modular Arithmetic 1 | 20 | |
| Jackhany1024 | Extended GCD | 20 | |
| Defensesole | ASCII | 5 | |
| Maryam99 | Adrien's Signs | 80 | |
| Jackhany1024 | Greatest Common Divisor | 15 | |
| Fatiimaaa | XOR Starter | 10 | |
| Jackhany1024 | Lemur XOR | 40 | |
| Jackhany1024 | Encoding Challenge | 40 | |
| Jackhany1024 | You either know, XOR you don't | 30 | |
| Jackhany1024 | Favourite byte | 20 | |
| Jackhany1024 | XOR Properties | 15 | |
| aditik | Finding Flags | 2 | |
| meowbigail | Base64 | 10 | |
| Jackhany1024 | XOR Starter | 10 | |
| Vlad_Valar | Finding Flags | 2 | |
| meowbigail | Hex | 5 | |
| Fatiimaaa | Bytes and Big Integers | 10 | |
| Jackhany1024 | Bytes and Big Integers | 10 |
You are now level Current level