| Date | User | Challenge | Score |
| Nunya777 | Legendre Symbol | 35 | |
| ungjae | Bringing It All Together | 50 | |
| Dropflux | XOR Starter | 10 | |
| hallabarhoumeh | Privacy-Enhanced Mail? | 25 | |
| ___d_z___ | Bytes and Big Integers | 10 | |
| Dropflux | Bytes and Big Integers | 10 | |
| caspeer | Base64 | 10 | |
| caspeer | Hex | 5 | |
| hallabarhoumeh | Modular Inverting | 25 | |
| hallabarhoumeh | Modular Arithmetic 2 | 20 | |
| Dropflux | Base64 | 10 | |
| hallabarhoumeh | Modular Arithmetic 1 | 20 | |
| caspeer | ASCII | 5 | |
| Dropflux | Hex | 5 | |
| caspeer | Great Snakes | 3 | |
| hallabarhoumeh | Extended GCD | 20 | |
| Dropflux | ASCII | 5 | |
| hallabarhoumeh | Lemur XOR | 40 | |
| Dropflux | Great Snakes | 3 | |
| caspeer | Finding Flags | 2 | |
| Dropflux | Finding Flags | 2 | |
| pypykatz | Structure of AES | 15 | |
| Brodyaga | Lemur XOR | 40 | |
| hallabarhoumeh | You either know, XOR you don't | 30 | |
| hallabarhoumeh | Favourite byte | 20 | |
| hallabarhoumeh | XOR Properties | 15 | |
| ungjae | Diffusion through Permutation | 30 | |
| hallabarhoumeh | Greatest Common Divisor | 15 | |
| hallabarhoumeh | XOR Starter | 10 | |
| hallabarhoumeh | Encoding Challenge | 40 | |
| hallabarhoumeh | Bytes and Big Integers | 10 | |
| hallabarhoumeh | Base64 | 10 | |
| hallabarhoumeh | Hex | 5 | |
| hallabarhoumeh | ASCII | 5 | |
| Brodyaga | You either know, XOR you don't | 30 | |
| 5H4RKK | The Matrix Reloaded | 100 | |
| ungjae | Confusion through Substitution | 25 | |
| ungjae | Round Keys | 20 | |
| ungjae | Structure of AES | 15 | |
| Brodyaga | Favourite byte | 20 | |
| ValT | Inferius Prime | 30 | |
| Falasi | Bytes and Big Integers | 10 | |
| kareemelfeel05 | Passwords as Keys | 50 | |
| ilyastarcek | RSA Backdoor Viability | 175 | |
| kareemelfeel05 | Modes of Operation Starter | 15 | |
| ilyastarcek | Ron was Wrong, Whit is Right | 90 | |
| Brisket9528 | Private Keys | 20 | |
| powtoo | Base64 | 10 | |
| powtoo | Hex | 5 | |
| kareemelfeel05 | Bringing It All Together | 50 |
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