| Date | User | Challenge | Score |
| I6nat1us_2011 | Background Reading | 5 | |
| Anucker101 | Structure of AES | 15 | |
| kosynus | Modular Inverting | 25 | |
| dannalopez23 | Great Snakes | 3 | |
| dannalopez23 | Finding Flags | 2 | |
| kosynus | Modular Arithmetic 2 | 20 | |
| S0lved_lynX | RSA Decryption | 20 | |
| S0lved_lynX | Private Keys | 20 | |
| kosynus | Modular Arithmetic 1 | 20 | |
| S0lved_lynX | Euler's Totient | 20 | |
| S0lved_lynX | Public Keys | 15 | |
| S0lved_lynX | Modular Exponentiation | 10 | |
| Anucker101 | Resisting Bruteforce | 10 | |
| Anucker101 | Keyed Permutations | 5 | |
| soec | XOR Starter | 10 | |
| soec | Bytes and Big Integers | 10 | |
| Aline123 | Signing Server | 60 | |
| 0xMrB34rd | Everything is Still Big | 100 | |
| soec | Base64 | 10 | |
| 0xMrB34rd | Crossed Wires | 100 | |
| Ahmed_Essam | Great Snakes | 3 | |
| whit3g4ndalf | Confusion through Substitution | 25 | |
| albraadluffy | Bytes and Big Integers | 10 | |
| LucaMaguire81 | Legendre Symbol | 35 | |
| kosynus | Extended GCD | 20 | |
| whit3g4ndalf | Round Keys | 20 | |
| emmpallis | You either know, XOR you don't | 30 | |
| yairko | Honest Verifier Zero Knowledge | 30 | |
| whit3g4ndalf | Structure of AES | 15 | |
| 0xMrB34rd | Everything is Big | 70 | |
| joeydumont | Quadratic Residues | 25 | |
| kosynus | Greatest Common Divisor | 15 | |
| Elisa | Finding Flags | 2 | |
| whit3g4ndalf | Resisting Bruteforce | 10 | |
| emmpallis | Favourite byte | 20 | |
| tobira | Diffusion through Permutation | 30 | |
| albraadluffy | Base64 | 10 | |
| albraadluffy | Hex | 5 | |
| emmpallis | XOR Properties | 15 | |
| LucaMaguire81 | Quadratic Residues | 25 | |
| albraadluffy | ASCII | 5 | |
| GabosCryptos | XOR Starter | 10 | |
| nnarek | Modular Binomials | 80 | |
| albraadluffy | Great Snakes | 3 | |
| albraadluffy | Finding Flags | 2 | |
| GabosCryptos | Bytes and Big Integers | 10 | |
| LucaMaguire81 | Modular Inverting | 25 | |
| GabosCryptos | Base64 | 10 | |
| GabosCryptos | Hex | 5 | |
| Moham3d_Simba | ASCII | 5 |
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