| Date | User | Challenge | Score |
| Kosta | Modular Inverting | 25 | |
| octtaine | Favourite byte | 20 | |
| octtaine | XOR Properties | 15 | |
| octtaine | XOR Starter | 10 | |
| octtaine | Bytes and Big Integers | 10 | |
| Spire | Exceptional Curves | 100 | |
| octtaine | Base64 | 10 | |
| Kravchenko | You either know, XOR you don't | 30 | |
| octtaine | Hex | 5 | |
| octtaine | ASCII | 5 | |
| Perevalov | Point Negation | 10 | |
| octtaine | Great Snakes | 3 | |
| Kravchenko | Favourite byte | 20 | |
| Perevalov | Background Reading | 5 | |
| firstplayer | Bytes and Big Integers | 10 | |
| Kravchenko | XOR Properties | 15 | |
| octtaine | Finding Flags | 2 | |
| Kravchenko | XOR Starter | 10 | |
| Kravchenko | Bytes and Big Integers | 10 | |
| pugachev | ASCII | 5 | |
| Kravchenko | Base64 | 10 | |
| yourcatwastaken | Modular Arithmetic 1 | 20 | |
| Kravchenko | Hex | 5 | |
| Kravchenko | ASCII | 5 | |
| CastorJr | Greatest Common Divisor | 15 | |
| Kravchenko | Great Snakes | 3 | |
| Kravchenko | Finding Flags | 2 | |
| Perevalov | Export-grade | 100 | |
| Perevalov | Parameter Injection | 60 | |
| firstplayer | Base64 | 10 | |
| jyppi | Working with Fields | 10 | |
| Kravchenko | Modular Binomials | 80 | |
| firstplayer | Hex | 5 | |
| Perevalov | Deriving Symmetric Keys | 40 | |
| sp1n0z4 | Symmetry | 50 | |
| sebastianmonroy | You either know, XOR you don't | 30 | |
| sebastianmonroy | Favourite byte | 20 | |
| Perevalov | Computing Shared Secrets | 30 | |
| sebastianmonroy | XOR Properties | 15 | |
| neitoroxin | Great Snakes | 3 | |
| Spire | Static Client | 100 | |
| Perevalov | Computing Public Values | 25 | |
| Spire | ECB Oracle | 60 | |
| neitoroxin | Finding Flags | 2 | |
| Kosta | Modular Arithmetic 2 | 20 | |
| sebastianmonroy | XOR Starter | 10 | |
| pugachev | Great Snakes | 3 | |
| Perevalov | Generators of Groups | 20 | |
| sebastianmonroy | Encoding Challenge | 40 | |
| Perevalov | Working with Fields | 10 |
You are now level Current level