| Date | User | Challenge | Score |
| Armament | Base64 | 10 | |
| Jeff6 | Great Snakes | 3 | |
| Armament | Hex | 5 | |
| Armament | ASCII | 5 | |
| prasadg | Great Snakes | 3 | |
| Subihenuer | Deriving Symmetric Keys | 40 | |
| prasadg | Finding Flags | 2 | |
| sredmond | You either know, XOR you don't | 30 | |
| sntt | Resisting Bruteforce | 10 | |
| Armament | Great Snakes | 3 | |
| Armament | Finding Flags | 2 | |
| lelexia | Modular Inverting | 25 | |
| lelexia | Modular Arithmetic 2 | 20 | |
| talidam | Adrien's Signs | 80 | |
| sntt | Keyed Permutations | 5 | |
| kennytheclown | Finding Flags | 2 | |
| bl4ck4rch | Favourite byte | 20 | |
| lelexia | Modular Arithmetic 1 | 20 | |
| cyk0sure | Additive | 70 | |
| alphaegg | Confusion through Substitution | 25 | |
| InRainbows | Working with Fields | 10 | |
| InRainbows | Modulus Inutilis | 50 | |
| talidam | Legendre Symbol | 35 | |
| hienthao123 | Base64 | 10 | |
| hienthao123 | Hex | 5 | |
| InRainbows | Salty | 20 | |
| hienthao123 | ASCII | 5 | |
| InRainbows | Manyprime | 40 | |
| aditya_kumeowka | Great Snakes | 3 | |
| aditya_kumeowka | Finding Flags | 2 | |
| talidam | Quadratic Residues | 25 | |
| hienthao123 | Great Snakes | 3 | |
| serg1979 | Network Attacks | 5 | |
| hienthao123 | Finding Flags | 2 | |
| InRainbows | Monoprime | 30 | |
| talidam | Modular Inverting | 25 | |
| NeutralB | Export-grade | 100 | |
| Pipo29 | Bean Counter | 60 | |
| Pipo29 | Symmetry | 50 | |
| Pipo29 | Flipping Cookie | 60 | |
| Pipo29 | ECB CBC WTF | 55 | |
| NeutralB | Parameter Injection | 60 | |
| Pipo29 | ECB Oracle | 60 | |
| serg1979 | You either know, XOR you don't | 30 | |
| serg1979 | Favourite byte | 20 | |
| mjuwaeni | Hex | 5 | |
| mjuwaeni | ASCII | 5 | |
| serg1979 | XOR Properties | 15 | |
| serg1979 | XOR Starter | 10 | |
| jonnytang | You either know, XOR you don't | 30 |
You are now level Current level