| Date | User | Challenge | Score |
| pjmgc | Flipping Cookie | 60 | |
| kmark | Favourite byte | 20 | |
| iniM0n | CERTainly not | 30 | |
| kmark | XOR Properties | 15 | |
| kitkitkit | Bringing It All Together | 50 | |
| Semjasa | Chinese Remainder Theorem | 40 | |
| hiabao | ASCII | 5 | |
| b1rd13 | Diffusion through Permutation | 30 | |
| kitkitkit | Diffusion through Permutation | 30 | |
| b1rd13 | Confusion through Substitution | 25 | |
| ruslanjon | Hex | 5 | |
| kitkitkit | Confusion through Substitution | 25 | |
| ruslanjon | ASCII | 5 | |
| lucky123 | Modular Binomials | 80 | |
| hiabao | Great Snakes | 3 | |
| mauust | Computing Public Values | 25 | |
| b1rd13 | Round Keys | 20 | |
| pjmgc | ECB Oracle | 60 | |
| iniM0n | Privacy-Enhanced Mail? | 25 | |
| simrol260 | Modular Inverting | 25 | |
| chk | CTRIME | 70 | |
| Semjasa | Modular Square Root | 35 | |
| simrol260 | Modular Arithmetic 2 | 20 | |
| wangfu | Square Eyes | 35 | |
| kitkitkit | Round Keys | 20 | |
| erickao | You either know, XOR you don't | 30 | |
| nidsat | Finding Flags | 2 | |
| simrol260 | Modular Arithmetic 1 | 20 | |
| wangfu | Inferius Prime | 30 | |
| kitkitkit | Structure of AES | 15 | |
| Cristhofer_AU | Modular Arithmetic 1 | 20 | |
| Arney1 | ZKP Introduction | 5 | |
| iniM0n | Lemur XOR | 40 | |
| Marsianin | Export-grade | 100 | |
| Cristhofer_AU | Greatest Common Divisor | 15 | |
| Marsianin | Parameter Injection | 60 | |
| iniM0n | Encoding Challenge | 40 | |
| Marsianin | Deriving Symmetric Keys | 40 | |
| Marsianin | Computing Shared Secrets | 30 | |
| b1rd13 | Modular Exponentiation | 10 | |
| Marsianin | Computing Public Values | 25 | |
| deepsleep | Hex | 5 | |
| Cristhofer_AU | Favourite byte | 20 | |
| Arney1 | Beatboxer | 150 | |
| Marsianin | Generators of Groups | 20 | |
| Marsianin | Working with Fields | 10 | |
| Marsianin | Modulus Inutilis | 50 | |
| Marsianin | Salty | 20 | |
| pjmgc | ECB CBC WTF | 55 | |
| Marsianin | Manyprime | 40 |
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