| Date | User | Challenge | Score |
| martyrant | You either know, XOR you don't | 30 | |
| NTRUDR | Quadratic Residues | 25 | |
| martyrant | Favourite byte | 20 | |
| ShahdElrawy | Deriving Symmetric Keys | 40 | |
| Gustavo_Adolfo | ASCII | 5 | |
| martyrant | XOR Properties | 15 | |
| Anass67 | Factoring | 15 | |
| ShahdElrawy | Computing Shared Secrets | 30 | |
| martyrant | XOR Starter | 10 | |
| Anass67 | RSA Signatures | 25 | |
| ShahdElrawy | Computing Public Values | 25 | |
| ShahdElrawy | Generators of Groups | 20 | |
| M4tt | You either know, XOR you don't | 30 | |
| martyrant | Encoding Challenge | 40 | |
| SigmaMonster | Modular Arithmetic 1 | 20 | |
| NTRUDR | Modular Inverting | 25 | |
| David_Solito | XOR Starter | 10 | |
| martyrant | Bytes and Big Integers | 10 | |
| NTRUDR | Modular Arithmetic 2 | 20 | |
| tacex_ | Transparency | 50 | |
| ShahdElrawy | Working with Fields | 10 | |
| martyrant | Base64 | 10 | |
| NTRUDR | Modular Arithmetic 1 | 20 | |
| Gustavo_Adolfo | Great Snakes | 3 | |
| Gustavo_Adolfo | Finding Flags | 2 | |
| SigmaMonster | Extended GCD | 20 | |
| martyrant | Hex | 5 | |
| ShahdElrawy | Modulus Inutilis | 50 | |
| martyrant | ASCII | 5 | |
| ShahdElrawy | Salty | 20 | |
| tacex_ | Encoding Challenge | 40 | |
| moskanor | Great Snakes | 3 | |
| David_Solito | Bytes and Big Integers | 10 | |
| brew | Efficient Exchange | 50 | |
| crypto_07 | Modular Arithmetic 1 | 20 | |
| moskanor | Finding Flags | 2 | |
| M4tt | Favourite byte | 20 | |
| David_Solito | Base64 | 10 | |
| martyrant | Network Attacks | 5 | |
| martyrant | Great Snakes | 3 | |
| martyrant | Finding Flags | 2 | |
| aboj0 | ECB Oracle | 60 | |
| David_Solito | Hex | 5 | |
| tacex_ | Network Attacks | 5 | |
| David_Solito | ASCII | 5 | |
| brew | Curves and Logs | 40 | |
| David_Solito | Great Snakes | 3 | |
| David_Solito | Finding Flags | 2 | |
| M4tt | XOR Properties | 15 | |
| gofmank | Montgomery's Ladder | 40 |
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