| Date | User | Challenge | Score |
| Frederik353 | Greatest Common Divisor | 15 | |
| Dimalano | Successive Powers | 60 | |
| pepina | Inferius Prime | 30 | |
| Akylbek | Symmetry | 50 | |
| zof751 | XOR Starter | 10 | |
| Akylbek | Triple DES | 60 | |
| crack_head | You either know, XOR you don't | 30 | |
| Nurbek77 | Adrien's Signs | 80 | |
| Adeka228 | Symmetry | 50 | |
| haddockPaella | Resisting Bruteforce | 10 | |
| Dimalano | Chinese Remainder Theorem | 40 | |
| Frederik353 | You either know, XOR you don't | 30 | |
| adrine | Modular Square Root | 35 | |
| MingLLuo | Encoding Challenge | 40 | |
| haddockPaella | Keyed Permutations | 5 | |
| Dimalano | Modular Square Root | 35 | |
| Frederik353 | Favourite byte | 20 | |
| Nurbek77 | Successive Powers | 60 | |
| zof751 | Bytes and Big Integers | 10 | |
| crack_head | Favourite byte | 20 | |
| VISAS_STARFROST | Network Attacks | 5 | |
| Quine | Background Reading | 5 | |
| MingLLuo | Bytes and Big Integers | 10 | |
| Frederik353 | XOR Properties | 15 | |
| Adeka228 | Triple DES | 60 | |
| ewhite | Diffusion through Permutation | 30 | |
| MingLLuo | Base64 | 10 | |
| Dimalano | Legendre Symbol | 35 | |
| iamsaleh846 | XOR Starter | 10 | |
| MingLLuo | Hex | 5 | |
| MingLLuo | ASCII | 5 | |
| MingLLuo | Network Attacks | 5 | |
| crack_head | XOR Properties | 15 | |
| MingLLuo | Great Snakes | 3 | |
| MingLLuo | Finding Flags | 2 | |
| M00rgana | Export-grade | 100 | |
| Dimalano | Quadratic Residues | 25 | |
| DavidTruong | Pad Thai | 80 | |
| Frederik353 | XOR Starter | 10 | |
| ewhite | Confusion through Substitution | 25 | |
| adrine | Legendre Symbol | 35 | |
| Frederik353 | Bytes and Big Integers | 10 | |
| lamng | Quadratic Residues | 25 | |
| shureek | Base64 | 10 | |
| shureek | Hex | 5 | |
| kkaitenu | ECB CBC WTF | 55 | |
| Frederik353 | Base64 | 10 | |
| ewhite | Round Keys | 20 | |
| Akylbek | Lazy CBC | 60 | |
| shureek | ASCII | 5 |
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