| Date | User | Challenge | Score |
| NEID017 | Base64 | 10 | |
| GameCity | Favourite byte | 20 | |
| xdxdfyc44 | Base64 | 10 | |
| X245001 | Hex | 5 | |
| only | You either know, XOR you don't | 30 | |
| Slight | Hex | 5 | |
| GameCity | XOR Properties | 15 | |
| aaambq | Hex | 5 | |
| Ankith_Abhayan | Secure Protocols | 5 | |
| tj520 | Favourite byte | 20 | |
| GameCity | XOR Starter | 10 | |
| lsj666 | Finding Flags | 2 | |
| Slight | ASCII | 5 | |
| y0dam4n | Efficient Exchange | 50 | |
| xdxdfyc44 | Hex | 5 | |
| shuaige | ASCII | 5 | |
| nadav07 | You either know, XOR you don't | 30 | |
| mypalpal | You either know, XOR you don't | 30 | |
| AZU2005 | ASCII | 5 | |
| aaambq | Great Snakes | 3 | |
| 1433223 | ASCII | 5 | |
| GameCity | Encoding Challenge | 40 | |
| nsbank | Elliptic Nodes | 150 | |
| Kamol | Finding Flags | 2 | |
| gggck | You either know, XOR you don't | 30 | |
| mypalpal | Favourite byte | 20 | |
| only | Favourite byte | 20 | |
| gggck | Favourite byte | 20 | |
| LittleHacker | Greatest Common Divisor | 15 | |
| NEID017 | Hex | 5 | |
| only | XOR Properties | 15 | |
| 1433223 | Great Snakes | 3 | |
| woof123 | Great Snakes | 3 | |
| X245001 | ASCII | 5 | |
| mypalpal | XOR Properties | 15 | |
| Slight | Network Attacks | 5 | |
| X245001 | Great Snakes | 3 | |
| X245001 | Finding Flags | 2 | |
| woof123 | Finding Flags | 2 | |
| alchemist7 | Round Keys | 20 | |
| mypalpal | XOR Starter | 10 | |
| NEID017 | ASCII | 5 | |
| hrj123 | Finding Flags | 2 | |
| yly330 | Finding Flags | 2 | |
| wjq1022 | Finding Flags | 2 | |
| aaa12 | Finding Flags | 2 | |
| wang123456 | Great Snakes | 3 | |
| aaambq | ASCII | 5 | |
| Namunamu | Privacy-Enhanced Mail? | 25 | |
| zzy1234 | Finding Flags | 2 |
You are now level Current level