| Date | User | Challenge | Score |
| Thaimeo2006 | Quadratic Residues | 25 | |
| Thaimeo2006 | Modular Inverting | 25 | |
| pgalumisin | Finding Flags | 2 | |
| dipychin | Favourite byte | 20 | |
| mduong | XOR Starter | 10 | |
| thainguyen_13 | Favourite byte | 20 | |
| mduong | Bytes and Big Integers | 10 | |
| ivyhco | You either know, XOR you don't | 30 | |
| yrighting | XOR Starter | 10 | |
| ivyhco | Favourite byte | 20 | |
| Thaimeo2006 | Modular Arithmetic 2 | 20 | |
| Thaimeo2006 | Modular Arithmetic 1 | 20 | |
| pupee | Great Snakes | 3 | |
| Thaimeo2006 | Extended GCD | 20 | |
| Mrsh1014 | ProSign 3 | 100 | |
| Melvine | Point Negation | 10 | |
| caffidev | Network Attacks | 5 | |
| Thaimeo2006 | Greatest Common Divisor | 15 | |
| arata | Hex | 5 | |
| Melvine | Background Reading | 5 | |
| caffidev | You either know, XOR you don't | 30 | |
| y0dam4n | Bytes and Big Integers | 10 | |
| Arnav_Thakare | Export-grade | 100 | |
| caffidev | Favourite byte | 20 | |
| TTING | Point Negation | 10 | |
| ivyhco | XOR Properties | 15 | |
| Melvine | Round Keys | 20 | |
| caffidev | XOR Properties | 15 | |
| arata | ASCII | 5 | |
| iyheart | Gaussian Reduction | 50 | |
| CorvuS | XOR Starter | 10 | |
| arata | Great Snakes | 3 | |
| Arnav_Thakare | Parameter Injection | 60 | |
| Melvine | Structure of AES | 15 | |
| arata | Finding Flags | 2 | |
| caffidev | XOR Starter | 10 | |
| MP18 | Bean Counter | 60 | |
| MP18 | Symmetry | 50 | |
| flouxtine | CTRIME | 70 | |
| MP18 | Flipping Cookie | 60 | |
| Delight18 | You either know, XOR you don't | 30 | |
| MP18 | ECB CBC WTF | 55 | |
| Delight18 | Favourite byte | 20 | |
| ShadetheAvali | Crossed Wires | 100 | |
| Delight18 | XOR Properties | 15 | |
| Delight18 | XOR Starter | 10 | |
| caffidev | Encoding Challenge | 40 | |
| iyheart | Gram Schmidt | 30 | |
| Delight18 | Bytes and Big Integers | 10 | |
| ivyhco | XOR Starter | 10 |
You are now level Current level