| Date | User | Challenge | Score |
| arsenal4eva | Modular Arithmetic 2 | 20 | |
| JhezzVilasco | Lemur XOR | 40 | |
| c0d4 | Extended GCD | 20 | |
| arsenal4eva | Modular Arithmetic 1 | 20 | |
| John_hill | Transparency | 50 | |
| tugado | Lemur XOR | 40 | |
| arsenal4eva | Extended GCD | 20 | |
| tugado | You either know, XOR you don't | 30 | |
| Jonathan1236 | Transparency | 50 | |
| Sagnik | Greatest Common Divisor | 15 | |
| 2ANielC | Transparency | 50 | |
| tugado | Favourite byte | 20 | |
| Rodel | ECB CBC WTF | 55 | |
| joswelsongday | ECB CBC WTF | 55 | |
| tugado | XOR Properties | 15 | |
| Rodenacquioben | Adrien's Signs | 80 | |
| dong | Base64 | 10 | |
| JhezzVilasco | Quadratic Residues | 25 | |
| tugado | Encoding Challenge | 40 | |
| Rodel | ECB Oracle | 60 | |
| joswelsongday | ECB Oracle | 60 | |
| popeb | Bytes and Big Integers | 10 | |
| John_hill | SSH Keys | 35 | |
| John_hill | CERTainly not | 30 | |
| Rodel | Passwords as Keys | 50 | |
| arsenal4eva | Greatest Common Divisor | 15 | |
| mavil27 | WOTS Up 2 | 90 | |
| joswelsongday | Passwords as Keys | 50 | |
| John_hill | Privacy-Enhanced Mail? | 25 | |
| Rodel | Modes of Operation Starter | 15 | |
| joswelsongday | Modes of Operation Starter | 15 | |
| hamtot | Passwords as Keys | 50 | |
| Jonathan1236 | SSH Keys | 35 | |
| Johnclark01 | SSH Keys | 35 | |
| hamtot | Modes of Operation Starter | 15 | |
| joswelsongday | Bringing It All Together | 50 | |
| Jerwin07 | Quadratic Residues | 25 | |
| arsenal4eva | You either know, XOR you don't | 30 | |
| joswelsongday | Diffusion through Permutation | 30 | |
| nous | Parameter Injection | 60 | |
| 2ANielC | SSH Keys | 35 | |
| joswelsongday | Confusion through Substitution | 25 | |
| joswelsongday | Round Keys | 20 | |
| John_hill | Computing Shared Secrets | 30 | |
| Johnclark01 | CERTainly not | 30 | |
| JhezzVilasco | Modular Inverting | 25 | |
| JhezzVilasco | Modular Arithmetic 2 | 20 | |
| JhezzVilasco | Modular Arithmetic 1 | 20 | |
| JhezzVilasco | Extended GCD | 20 | |
| Jonathan1236 | CERTainly not | 30 |
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