| Date | User | Challenge | Score |
| leenAqraa | Hex | 5 | |
| sseb | Base64 | 10 | |
| gluecicle | Structure of AES | 15 | |
| leenAqraa | ASCII | 5 | |
| aiberus | Modular Arithmetic 1 | 20 | |
| sseb | Hex | 5 | |
| Nathaly_Castillo | Privacy-Enhanced Mail? | 25 | |
| leenAqraa | Great Snakes | 3 | |
| mzz | Confusion through Substitution | 25 | |
| aiberus | Extended GCD | 20 | |
| leenAqraa | Finding Flags | 2 | |
| muqqi | Monoprime | 30 | |
| kev6 | Diffusion through Permutation | 30 | |
| lobonicter | ASCII | 5 | |
| lobonicter | Network Attacks | 5 | |
| matiosos | CERTainly not | 30 | |
| kev6 | Confusion through Substitution | 25 | |
| sseb | ASCII | 5 | |
| thaer | Finding Flags | 2 | |
| mmihov | Export-grade | 100 | |
| LordZorg | XOR Properties | 15 | |
| Cyber_ghost | Base64 | 10 | |
| Blossom42 | Bytes and Big Integers | 10 | |
| Cyber_ghost | Hex | 5 | |
| Pearce | Great Snakes | 3 | |
| matiosos | Privacy-Enhanced Mail? | 25 | |
| Cyber_ghost | ASCII | 5 | |
| matiosos | Modular Inverting | 25 | |
| muqqi | Factoring | 15 | |
| guyko | Bean Counter | 60 | |
| kev6 | Round Keys | 20 | |
| Pearce | Finding Flags | 2 | |
| Cyber_ghost | Great Snakes | 3 | |
| sseb | Network Attacks | 5 | |
| roogs22 | Diffusion through Permutation | 30 | |
| maksushka | JSON in JSON | 40 | |
| ray1483 | Modular Inverting | 25 | |
| mmihov | Parameter Injection | 60 | |
| useruser150 | Structure of AES | 15 | |
| skimmer | Smooth Criminal | 60 | |
| meeepmeeep | Oh SNAP | 120 | |
| useruser150 | Keyed Permutations | 5 | |
| OxSama | ASCII | 5 | |
| Nand_Tanner999 | Modular Arithmetic 1 | 20 | |
| OxSama | Great Snakes | 3 | |
| ray1483 | Modular Arithmetic 2 | 20 | |
| ray1483 | Modular Arithmetic 1 | 20 | |
| Praimus7 | Legendre Symbol | 35 | |
| ray1483 | Extended GCD | 20 | |
| stellev | Collider | 50 |
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