| Date | User | Challenge | Score |
| sasvi | Modular Arithmetic 2 | 20 | |
| D3yAaN | Favourite byte | 20 | |
| erickao | Keyed Permutations | 5 | |
| ayoubaitlaarbi | Hex | 5 | |
| nao_sei | Modular Square Root | 35 | |
| evarist | Forbidden Fruit | 150 | |
| ShowySyrup | Greatest Common Divisor | 15 | |
| D3yAaN | XOR Properties | 15 | |
| yoav_s | Find the Lattice | 100 | |
| 1lettuce | You either know, XOR you don't | 30 | |
| Kweenieman | Finding Flags | 2 | |
| Woodsman | Confusion through Substitution | 25 | |
| sasvi | Modular Arithmetic 1 | 20 | |
| darkknight | Private Keys | 20 | |
| 1lettuce | Favourite byte | 20 | |
| MarkAnton00 | ASCII | 5 | |
| D3yAaN | XOR Starter | 10 | |
| JOJAR | Additive | 70 | |
| MarkAnton00 | Great Snakes | 3 | |
| D3yAaN | Bytes and Big Integers | 10 | |
| ShowySyrup | You either know, XOR you don't | 30 | |
| adithyaa_rg | Hex | 5 | |
| liebefinden | XOR Starter | 10 | |
| sasvi | Extended GCD | 20 | |
| 1lettuce | XOR Properties | 15 | |
| seqo | Legendre Symbol | 35 | |
| ShowySyrup | Favourite byte | 20 | |
| Stefanie42 | Diffusion through Permutation | 30 | |
| adithyaa_rg | ASCII | 5 | |
| Stefanie42 | Confusion through Substitution | 25 | |
| adithyaa_rg | Great Snakes | 3 | |
| ShowySyrup | XOR Properties | 15 | |
| Stefanie42 | Round Keys | 20 | |
| 1lettuce | XOR Starter | 10 | |
| TurningPointer | You either know, XOR you don't | 30 | |
| blancoale07 | Script Kiddie | 70 | |
| Stefanie42 | Structure of AES | 15 | |
| Stefanie42 | Resisting Bruteforce | 10 | |
| adithyaa_rg | Finding Flags | 2 | |
| Stefanie42 | Keyed Permutations | 5 | |
| blancoale07 | Additive | 70 | |
| Stefanie42 | Additive | 70 | |
| villag | Base64 | 10 | |
| blancoale07 | Static Client 2 | 120 | |
| Stefanie42 | Export-grade | 100 | |
| D3yAaN | Base64 | 10 | |
| sebastianmonroy | Triple DES | 60 | |
| blancoale07 | Static Client | 100 | |
| villag | Hex | 5 | |
| blancoale07 | Export-grade | 100 |
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