| Date | User | Challenge | Score |
| DeusexMachina | XOR Properties | 15 | |
| nervantus | Base64 | 10 | |
| ahmqd | Hamiltonicity 2 | 175 | |
| ahmqd | Hamiltonicity 2 (CryptoHack) | 0 | |
| nervantus | Hex | 5 | |
| DeusexMachina | XOR Starter | 10 | |
| nervantus | ASCII | 5 | |
| elysios | Confusion through Substitution | 25 | |
| nervantus | Great Snakes | 3 | |
| DeusexMachina | Bytes and Big Integers | 10 | |
| nervantus | Finding Flags | 2 | |
| DeusexMachina | Base64 | 10 | |
| DeusexMachina | Hex | 5 | |
| DeusexMachina | ASCII | 5 | |
| DeusexMachina | Great Snakes | 3 | |
| Fichua | Bringing It All Together | 50 | |
| DeusexMachina | Finding Flags | 2 | |
| mopedist | Exceptional Curves | 100 | |
| Fichua | Diffusion through Permutation | 30 | |
| mopedist | Smooth Criminal | 60 | |
| mopedist | Efficient Exchange | 50 | |
| mopedist | Curves and Logs | 40 | |
| mopedist | Scalar Multiplication | 35 | |
| pineapplefish | You either know, XOR you don't | 30 | |
| mopedist | Point Addition | 30 | |
| mopedist | Point Negation | 10 | |
| mopedist | Background Reading | 5 | |
| elysios | Round Keys | 20 | |
| MaxTwister | Finding Flags | 2 | |
| mopedist | The Matrix Revolutions | 125 | |
| pineapplefish | Favourite byte | 20 | |
| elysios | Structure of AES | 15 | |
| pineapplefish | XOR Properties | 15 | |
| nicolasromito330 | Structure of AES | 15 | |
| nicolasromito330 | Round Keys | 20 | |
| elysios | Resisting Bruteforce | 10 | |
| elysios | Keyed Permutations | 5 | |
| Cloud_ | Modular Square Root | 35 | |
| chedi | You either know, XOR you don't | 30 | |
| siriusraven | Jack's Birthday Confusion | 30 | |
| ahmqd | Oracular Spectacular | 150 | |
| RichardAkin | ASCII | 5 | |
| nicolasromito330 | Resisting Bruteforce | 10 | |
| nicolasromito330 | Keyed Permutations | 5 | |
| pineapplefish | XOR Starter | 10 | |
| Cloud_ | Montgomery's Ladder | 40 | |
| chedi | Favourite byte | 20 | |
| anesteziker | Base64 | 10 | |
| grazkaa | Bespoke Padding | 100 | |
| anesteziker | Hex | 5 |
You are now level Current level