| Date | User | Challenge | Score |
| lOkOtOdO | Hex | 5 | |
| g4dZ0r | Passwords as Keys | 50 | |
| Myronarty | Factoring | 15 | |
| lOkOtOdO | ASCII | 5 | |
| ob5erver | Modular Arithmetic 1 | 20 | |
| Yuvaraj_selvaraj | Hex | 5 | |
| lOkOtOdO | Great Snakes | 3 | |
| ob5erver | Extended GCD | 20 | |
| Yuvaraj_selvaraj | ASCII | 5 | |
| Musca | Static Client 2 | 120 | |
| lOkOtOdO | Finding Flags | 2 | |
| miiyen | Point Negation | 10 | |
| aihtaf | You either know, XOR you don't | 30 | |
| Yuvaraj_selvaraj | Great Snakes | 3 | |
| cxy | Quadratic Residues | 25 | |
| lmlA | Bytes and Big Integers | 10 | |
| ibpu | Great Snakes | 3 | |
| onebyte2much | Resisting Bruteforce | 10 | |
| aihtaf | Favourite byte | 20 | |
| cxy | Factoring | 15 | |
| xYSx | XOR Starter | 10 | |
| onebyte2much | Keyed Permutations | 5 | |
| mee217 | Bytes and Big Integers | 10 | |
| fkasnsu704 | Great Snakes | 3 | |
| ibpu | Finding Flags | 2 | |
| fkasnsu704 | Finding Flags | 2 | |
| katanabeneficial | Modes of Operation Starter | 15 | |
| hanahiennguyen | Bringing It All Together | 50 | |
| debzw | Hex | 5 | |
| Yuvaraj_selvaraj | Finding Flags | 2 | |
| debzw | ASCII | 5 | |
| aihtaf | XOR Properties | 15 | |
| debzw | Great Snakes | 3 | |
| Quily | Privacy-Enhanced Mail? | 25 | |
| aihtaf | XOR Starter | 10 | |
| debzw | Finding Flags | 2 | |
| Quily | SSH Keys | 35 | |
| aihtaf | Bytes and Big Integers | 10 | |
| miiyen | Background Reading | 5 | |
| Quily | Transparency | 50 | |
| g4dZ0r | Modes of Operation Starter | 15 | |
| asdfeugs | Transparency | 50 | |
| 19030623652 | Moving Problems | 150 | |
| cxy | Private Keys | 20 | |
| sanny | Adrien's Signs | 80 | |
| 19030623652 | ProSign 3 | 100 | |
| cxy | Euler's Totient | 20 | |
| aihtaf | Base64 | 10 | |
| cxy | Public Keys | 15 | |
| cxy | Modular Exponentiation | 10 |
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