| Date | User | Challenge | Score |
| th3cha1rman | Finding Flags | 2 | |
| duckpancakes | CTRIME | 70 | |
| HackerDucker11 | Symmetry | 50 | |
| syphonkiller | Finding Flags | 2 | |
| BrainerChampion | Legendre Symbol | 35 | |
| Darkphantom | Bringing It All Together | 50 | |
| FUJAJA | You either know, XOR you don't | 30 | |
| M4VN | Great Snakes | 3 | |
| alm | Bean Counter | 60 | |
| alm | Symmetry | 50 | |
| nabin550 | You either know, XOR you don't | 30 | |
| nabin550 | Favourite byte | 20 | |
| nabin550 | XOR Properties | 15 | |
| alm | Flipping Cookie | 60 | |
| FUJAJA | Favourite byte | 20 | |
| Madim | Parameter Injection | 60 | |
| HackerDucker11 | Triple DES | 60 | |
| thymoney35 | Base64 | 10 | |
| nabin550 | XOR Starter | 10 | |
| hyouchun | Modular Square Root | 35 | |
| elyashue | Structure of AES | 15 | |
| HOA | Privacy-Enhanced Mail? | 25 | |
| nabin550 | Bytes and Big Integers | 10 | |
| alm | ECB Oracle | 60 | |
| nabin550 | Base64 | 10 | |
| M4VN | Finding Flags | 2 | |
| nabin550 | Hex | 5 | |
| user1300 | Modes of Operation Starter | 15 | |
| luthfiialghazali | You either know, XOR you don't | 30 | |
| FUJAJA | XOR Properties | 15 | |
| playerXLR8 | XOR Starter | 10 | |
| nabin550 | ASCII | 5 | |
| alm | Passwords as Keys | 50 | |
| nabin550 | Great Snakes | 3 | |
| user1300 | Bringing It All Together | 50 | |
| Slov | Bytes and Big Integers | 10 | |
| BrainerChampion | Quadratic Residues | 25 | |
| ngynmq | Toshi's Treasure | 150 | |
| nabin550 | Finding Flags | 2 | |
| FUJAJA | XOR Starter | 10 | |
| skullknight | Bytes and Big Integers | 10 | |
| waldoz | ASCII | 5 | |
| alm | Modes of Operation Starter | 15 | |
| Madim | Deriving Symmetric Keys | 40 | |
| NjeoYuen | Export-grade | 100 | |
| jhenrique04 | ASCII | 5 | |
| DragonUncle_US45 | ASCII | 5 | |
| elyashue | Resisting Bruteforce | 10 | |
| luthfiialghazali | Favourite byte | 20 | |
| Madim | Computing Shared Secrets | 30 |
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