| Date | User | Challenge | Score |
| pas25 | ECB CBC WTF | 55 | |
| Wenennefer | Let's Decrypt | 80 | |
| alexcy | ProSign 3 | 100 | |
| lafleury | ASCII | 5 | |
| nadal00n | Keyed Permutations | 5 | |
| mao | Round Keys | 20 | |
| snkt | Network Attacks | 5 | |
| mao | Structure of AES | 15 | |
| nadal00n | You either know, XOR you don't | 30 | |
| mao | Transparency | 50 | |
| lafleury | Great Snakes | 3 | |
| Raspberry | Everything is Big | 70 | |
| pas25 | Passwords as Keys | 50 | |
| lafleury | Finding Flags | 2 | |
| m4rked | Bean Counter | 60 | |
| mao | SSH Keys | 35 | |
| johann507 | Greatest Common Divisor | 15 | |
| nikku | Adrien's Signs | 80 | |
| mao | CERTainly not | 30 | |
| nadal00n | Favourite byte | 20 | |
| mao | Privacy-Enhanced Mail? | 25 | |
| nadal00n | XOR Properties | 15 | |
| johann507 | You either know, XOR you don't | 30 | |
| Wenennefer | Montgomery's Ladder | 40 | |
| pas25 | Modes of Operation Starter | 15 | |
| mao | ZKP Introduction | 5 | |
| nadal00n | XOR Starter | 10 | |
| carlo3diborb1 | Bytes and Big Integers | 10 | |
| nadal00n | Bytes and Big Integers | 10 | |
| nadal00n | Base64 | 10 | |
| m4rked | Symmetry | 50 | |
| nadal00n | Hex | 5 | |
| carlo3diborb1 | Base64 | 10 | |
| roogs22 | Parameter Injection | 60 | |
| nadal00n | ASCII | 5 | |
| carlo3diborb1 | Hex | 5 | |
| carlo3diborb1 | ASCII | 5 | |
| nadal00n | Great Snakes | 3 | |
| nadal00n | Finding Flags | 2 | |
| carlo3diborb1 | Great Snakes | 3 | |
| carlo3diborb1 | Finding Flags | 2 | |
| stellev | SSH Keys | 35 | |
| rizv_exe | Ron was Wrong, Whit is Right | 90 | |
| roogs22 | Deriving Symmetric Keys | 40 | |
| roogs22 | Computing Shared Secrets | 30 | |
| johann507 | Favourite byte | 20 | |
| snkt | Quadratic Residues | 25 | |
| roogs22 | Computing Public Values | 25 | |
| thefakejeff | Modular Square Root | 35 | |
| aie0094 | Finding Flags | 2 |
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