| Date | User | Challenge | Score |
| Sharan07 | Keyed Permutations | 5 | |
| OuahLePleutre | Round Keys | 20 | |
| Lyca | Generators of Groups | 20 | |
| RezaWijayanti | Flipping Cookie | 60 | |
| RezaWijayanti | ECB CBC WTF | 55 | |
| RezaWijayanti | ECB Oracle | 60 | |
| Lyca | Working with Fields | 10 | |
| OuahLePleutre | Structure of AES | 15 | |
| RAVEN_031 | Moving Problems | 150 | |
| prabhat | ASCII | 5 | |
| prabhat | Great Snakes | 3 | |
| prabhat | Finding Flags | 2 | |
| Nomanur | Token Appreciation | 5 | |
| gsdz | Quadratic Residues | 25 | |
| monkeyDluffy | CERTainly not | 30 | |
| gsdz | Modular Inverting | 25 | |
| gsdz | Modular Arithmetic 2 | 20 | |
| gsdz | Modular Arithmetic 1 | 20 | |
| gsdz | Extended GCD | 20 | |
| gorje | Moving Problems | 150 | |
| gsdz | Greatest Common Divisor | 15 | |
| diffelapi | Computing Shared Secrets | 30 | |
| gsdz | You either know, XOR you don't | 30 | |
| gsdz | Favourite byte | 20 | |
| gsdz | XOR Properties | 15 | |
| gsdz | XOR Starter | 10 | |
| gsdz | Bytes and Big Integers | 10 | |
| gsdz | Base64 | 10 | |
| gsdz | Hex | 5 | |
| administrator___ | Modular Arithmetic 1 | 20 | |
| magda_almpani | Generators of Groups | 20 | |
| gsdz | ASCII | 5 | |
| piggo | Network Attacks | 5 | |
| Riveroid | Bytes and Big Integers | 10 | |
| Nomanur | Base64 | 10 | |
| gorje | ProSign 3 | 100 | |
| piggo | Passwords as Keys | 50 | |
| tomato7 | You either know, XOR you don't | 30 | |
| tomato7 | Favourite byte | 20 | |
| tomato7 | XOR Properties | 15 | |
| tomato7 | XOR Starter | 10 | |
| Nomanur | Hex | 5 | |
| monkeyDluffy | Privacy-Enhanced Mail? | 25 | |
| tomato7 | Bytes and Big Integers | 10 | |
| gorje | Curveball | 100 | |
| Nomanur | ASCII | 5 | |
| test12313t344132 | Modular Arithmetic 2 | 20 | |
| gsdz | Great Snakes | 3 | |
| gorje | Smooth Criminal | 60 | |
| gsdz | Finding Flags | 2 |
You are now level Current level