| Date | User | Challenge | Score |
| minimini | Finding Flags | 2 | |
| B3AC0N | Hex | 5 | |
| karasec | Modular Inverting | 25 | |
| Rrahel_Alemu | Base64 | 10 | |
| Doemae | Passwords as Keys | 50 | |
| moaoifff | Great Snakes | 3 | |
| B3AC0N | ASCII | 5 | |
| richy | Great Snakes | 3 | |
| richy | Finding Flags | 2 | |
| Rrahel_Alemu | Hex | 5 | |
| Manorom | Modular Inverting | 25 | |
| moaoifff | Finding Flags | 2 | |
| Manorom | Modular Arithmetic 2 | 20 | |
| Manorom | Modular Arithmetic 1 | 20 | |
| B3AC0N | Great Snakes | 3 | |
| Manorom | Extended GCD | 20 | |
| vanMjnh | Authenticated Handshake | 40 | |
| B3AC0N | Finding Flags | 2 | |
| Doemae | Modes of Operation Starter | 15 | |
| ippo717273 | Base64 | 10 | |
| ippo717273 | ASCII | 5 | |
| Doemae | Bringing It All Together | 50 | |
| Rrahel_Alemu | ASCII | 5 | |
| vanMjnh | Real Curve Crypto | 200 | |
| Rrahel_Alemu | Great Snakes | 3 | |
| Pingxin_Zhu | Great Snakes | 3 | |
| Rrahel_Alemu | Finding Flags | 2 | |
| Pingxin_Zhu | Finding Flags | 2 | |
| Dexecuting | Passwords as Keys | 50 | |
| vanMjnh | DLOG on the Surface | 40 | |
| PicolasCage | Finding Flags | 2 | |
| Doemae | Structure of AES | 15 | |
| ippo717273 | Hex | 5 | |
| bluesky2113 | Encoding Challenge | 40 | |
| rwxerwx | XOR Starter | 10 | |
| vanMjnh | LFSR Destroyer | 250 | |
| Doemae | Diffusion through Permutation | 30 | |
| vanMjnh | Jeff's LFSR | 150 | |
| rwxerwx | Bytes and Big Integers | 10 | |
| jimmy20180130 | Salty | 20 | |
| Doemae | Confusion through Substitution | 25 | |
| Dexecuting | Modes of Operation Starter | 15 | |
| 3kn0ch | Base64 | 10 | |
| vanMjnh | Toshi's Treasure | 150 | |
| Doemae | Round Keys | 20 | |
| oneor | Greatest Common Divisor | 15 | |
| Sieverosy | Base64 | 10 | |
| Doemae | Resisting Bruteforce | 10 | |
| rwxerwx | Base64 | 10 | |
| Doemae | Keyed Permutations | 5 |
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