| Date | User | Challenge | Score |
| temp1808 | Hex | 5 | |
| Justmightbeguapo | Base64 | 10 | |
| Isabela | You either know, XOR you don't | 30 | |
| ThinKing | Bruce Schneier's Password: Part 2 | 250 | |
| LiuGuanYi | You either know, XOR you don't | 30 | |
| ThinKing | Bruce Schneier's Password | 100 | |
| ThinKing | Bit by Bit | 100 | |
| Justmightbeguapo | Hex | 5 | |
| ThibThib | Modular Arithmetic 1 | 20 | |
| QRms | Double and Broken | 50 | |
| starnotes | Manyprime | 40 | |
| 4AAA4 | Point Addition | 30 | |
| temp1808 | ASCII | 5 | |
| Justmightbeguapo | ASCII | 5 | |
| Justmightbeguapo | Great Snakes | 3 | |
| hamon | Bringing It All Together | 50 | |
| yomama | Base64 | 10 | |
| starnotes | Monoprime | 30 | |
| LiuGuanYi | Favourite byte | 20 | |
| abdalwahab | Transparency | 50 | |
| abdalwahab | SSH Keys | 35 | |
| abdalwahab | CERTainly not | 30 | |
| randB | Infinite Descent | 50 | |
| abdalwahab | Privacy-Enhanced Mail? | 25 | |
| abdalwahab | Modular Inverting | 25 | |
| abdalwahab | Modular Arithmetic 2 | 20 | |
| abdalwahab | Modular Arithmetic 1 | 20 | |
| abdalwahab | Extended GCD | 20 | |
| abdalwahab | Greatest Common Divisor | 15 | |
| hamon | Diffusion through Permutation | 30 | |
| LiuGuanYi | XOR Properties | 15 | |
| starnotes | Factoring | 15 | |
| yomama | Hex | 5 | |
| Justmightbeguapo | Finding Flags | 2 | |
| starnotes | RSA Signatures | 25 | |
| alice77 | Adrien's Signs | 80 | |
| bobiealice | PriMeD5 | 100 | |
| ThinKing | DLOG on the Surface | 40 | |
| taki1 | Monoprime | 30 | |
| HandyZahwan04 | ASCII | 5 | |
| untether | Modular Inverting | 25 | |
| LiuGuanYi | XOR Starter | 10 | |
| abdalwahab | Lemur XOR | 40 | |
| abdalwahab | You either know, XOR you don't | 30 | |
| Isabela | Favourite byte | 20 | |
| abdalwahab | Favourite byte | 20 | |
| abdalwahab | XOR Properties | 15 | |
| abdalwahab | XOR Starter | 10 | |
| abdalwahab | Encoding Challenge | 40 | |
| abdalwahab | Bytes and Big Integers | 10 |
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