| Date | User | Challenge | Score |
| Kronyx | Base64 | 10 | |
| ashermkn1 | Signing Server | 60 | |
| LittleHacker | Base64 | 10 | |
| Kronyx | Hex | 5 | |
| tode | Legendre Symbol | 35 | |
| Redin | XOR Starter | 10 | |
| Kronyx | ASCII | 5 | |
| LittleHacker | Hex | 5 | |
| alzzz | Quadratic Residues | 25 | |
| Kronyx | Great Snakes | 3 | |
| Kronyx | Finding Flags | 2 | |
| Redin | Bytes and Big Integers | 10 | |
| rex_ | Confusion through Substitution | 25 | |
| LittleHacker | ASCII | 5 | |
| Highlander2 | Bringing It All Together | 50 | |
| Riapaglu | Modular Arithmetic 2 | 20 | |
| LittleHacker | Great Snakes | 3 | |
| neowo | Transparency | 50 | |
| rex_ | Round Keys | 20 | |
| ooooooo | RSA Decryption | 20 | |
| Riapaglu | Modular Arithmetic 1 | 20 | |
| Kalig | Greatest Common Divisor | 15 | |
| LittleHacker | Finding Flags | 2 | |
| Redin | Base64 | 10 | |
| incarcius | Bytes and Big Integers | 10 | |
| neowo | SSH Keys | 35 | |
| neowo | CERTainly not | 30 | |
| lcalvie | Bespoke Padding | 100 | |
| neowo | Privacy-Enhanced Mail? | 25 | |
| Riapaglu | Extended GCD | 20 | |
| neowo | Modular Inverting | 25 | |
| Highlander2 | Diffusion through Permutation | 30 | |
| Redin | Hex | 5 | |
| Highlander2 | Confusion through Substitution | 25 | |
| Kalig | Network Attacks | 5 | |
| neowo | Modular Arithmetic 2 | 20 | |
| neowo | Modular Arithmetic 1 | 20 | |
| neowo | Extended GCD | 20 | |
| neowo | Greatest Common Divisor | 15 | |
| Highlander2 | Round Keys | 20 | |
| neowo | Lemur XOR | 40 | |
| bambam | Finding Flags | 2 | |
| neowo | You either know, XOR you don't | 30 | |
| awesomedelight4 | Round Keys | 20 | |
| sheerwood | RSA Decryption | 20 | |
| Highlander2 | Structure of AES | 15 | |
| Riapaglu | Greatest Common Divisor | 15 | |
| awesomedelight4 | Structure of AES | 15 | |
| Riapaglu | Lemur XOR | 40 | |
| sheerwood | Private Keys | 20 |
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