| Date | User | Challenge | Score |
| uxxct | XOR Starter | 10 | |
| adios | Modular Square Root | 35 | |
| zer0net | Modular Arithmetic 1 | 20 | |
| aurel | Euler's Totient | 20 | |
| uxxct | Bytes and Big Integers | 10 | |
| aurel | Public Keys | 15 | |
| uxxct | Base64 | 10 | |
| uxxct | Hex | 5 | |
| aurel | Modular Exponentiation | 10 | |
| uxxct | ASCII | 5 | |
| uxxct | Great Snakes | 3 | |
| benedictst | Working with Fields | 10 | |
| uxxct | Finding Flags | 2 | |
| eoin | Public Keys | 15 | |
| Kospatt | Stream of Consciousness | 80 | |
| Jrx7 | Transparency | 50 | |
| eoin | Modular Exponentiation | 10 | |
| Jrx7 | SSH Keys | 35 | |
| Jrx7 | CERTainly not | 30 | |
| Jrx7 | Privacy-Enhanced Mail? | 25 | |
| Jrx7 | Modular Inverting | 25 | |
| Jrx7 | Modular Arithmetic 2 | 20 | |
| shadowguy | Infinite Descent | 50 | |
| Jrx7 | Modular Arithmetic 1 | 20 | |
| Jrx7 | Extended GCD | 20 | |
| Jrx7 | Greatest Common Divisor | 15 | |
| Jrx7 | Lemur XOR | 40 | |
| gellyfisher | PriMeD5 | 100 | |
| eoin | Saying Hello | 20 | |
| Jrx7 | You either know, XOR you don't | 30 | |
| Jrx7 | Favourite byte | 20 | |
| Jrx7 | XOR Properties | 15 | |
| Jrx7 | XOR Starter | 10 | |
| snbhowmik | Base64 | 10 | |
| DonAsako | Additive | 70 | |
| zer0net | Extended GCD | 20 | |
| Jrx7 | Encoding Challenge | 40 | |
| Jrx7 | Bytes and Big Integers | 10 | |
| snbhowmik | Hex | 5 | |
| anes234 | Structure of AES | 15 | |
| ra_mn | Resisting Bruteforce | 10 | |
| eoin | TLS Handshake | 15 | |
| Jrx7 | Base64 | 10 | |
| ra_mn | Keyed Permutations | 5 | |
| Jrx7 | Hex | 5 | |
| Jrx7 | ASCII | 5 | |
| eoin | Sharks on the Wire | 10 | |
| DonAsako | Script Kiddie | 70 | |
| Despoina | Favourite byte | 20 | |
| anes234 | Resisting Bruteforce | 10 |
You are now level Current level