| Date | User | Challenge | Score |
| zypher_02 | Base64 | 10 | |
| Weakness | Finding Flags | 2 | |
| Samigo | Great Snakes | 3 | |
| Grupo04MatAplic | Keyed Permutations | 5 | |
| hynxio | Keyed Permutations | 5 | |
| Average_joe404 | Finding Flags | 2 | |
| Samigo | Finding Flags | 2 | |
| Woodsman | Modes of Operation Starter | 15 | |
| jankibananki | XOR Starter | 10 | |
| 23_hari | XOR Properties | 15 | |
| giardinodecorati | You either know, XOR you don't | 30 | |
| MrGl1tchNu11 | Modular Square Root | 35 | |
| D3yAaN | RSA Decryption | 20 | |
| sp1n0z4 | Background Reading | 5 | |
| jankibananki | Bytes and Big Integers | 10 | |
| ayoubaitlaarbi | You either know, XOR you don't | 30 | |
| jankibananki | Base64 | 10 | |
| MrGl1tchNu11 | Legendre Symbol | 35 | |
| jankibananki | Hex | 5 | |
| jankibananki | ASCII | 5 | |
| annalisa | CTRIME | 70 | |
| FAZer0 | Favourite byte | 20 | |
| M00rgana | CERTainly not | 30 | |
| FAZer0 | XOR Properties | 15 | |
| jankibananki | Great Snakes | 3 | |
| jankibananki | Finding Flags | 2 | |
| M00rgana | Privacy-Enhanced Mail? | 25 | |
| Charararu | XOR Properties | 15 | |
| zafa | Modes of Operation Starter | 15 | |
| zafa | Bringing It All Together | 50 | |
| Ajiww | Modes of Operation Starter | 15 | |
| Charararu | XOR Starter | 10 | |
| zafa | Diffusion through Permutation | 30 | |
| Ajiww | Bringing It All Together | 50 | |
| zafa | Confusion through Substitution | 25 | |
| Alfonse42 | Great Snakes | 3 | |
| Ajiww | Diffusion through Permutation | 30 | |
| sayai | Finding Flags | 2 | |
| zafa | Round Keys | 20 | |
| luminous1 | XOR Properties | 15 | |
| Ajiww | Confusion through Substitution | 25 | |
| Ajiww | Round Keys | 20 | |
| Dewin | Bringing It All Together | 50 | |
| zafa | Structure of AES | 15 | |
| Ajiww | Structure of AES | 15 | |
| zafa | Resisting Bruteforce | 10 | |
| zafa | Keyed Permutations | 5 | |
| Agnumen | Flipping Cookie | 60 | |
| Alfonse42 | Finding Flags | 2 | |
| Floppy123 | Signing Server | 60 |
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