| Date | User | Challenge | Score |
| lid | ProSign 3 | 100 | |
| DominikRolek | Round Keys | 20 | |
| pawlik | Resisting Bruteforce | 10 | |
| kuso21 | Modulus Inutilis | 50 | |
| M4DD0C74 | Efficient Exchange | 50 | |
| IoaMertz | RSA Signatures | 25 | |
| DominikRolek | Structure of AES | 15 | |
| js | Modular Arithmetic 1 | 20 | |
| anska | XOR Starter | 10 | |
| Pilar | XOR Starter | 10 | |
| mark14 | XOR Properties | 15 | |
| DominikRolek | Resisting Bruteforce | 10 | |
| absimaman | Quadratic Residues | 25 | |
| bhanuPathak | XOR Properties | 15 | |
| DominikRolek | Keyed Permutations | 5 | |
| anastef | Parameter Injection | 60 | |
| ubercustomer1337 | Passwords as Keys | 50 | |
| 290010 | Collider | 50 | |
| 290010 | Jack's Birthday Confusion | 30 | |
| noura | Deriving Symmetric Keys | 40 | |
| amirediluly | Bean Counter | 60 | |
| smichi | Hex | 5 | |
| tjoyeux | ASCII | 5 | |
| IoaMertz | RSA Decryption | 20 | |
| mark14 | XOR Starter | 10 | |
| noura | Computing Shared Secrets | 30 | |
| 0xC1ph3r | Base64 | 10 | |
| tjoyeux | Great Snakes | 3 | |
| SadInfinite | Base64 | 10 | |
| absimaman | Modular Inverting | 25 | |
| bhanuPathak | XOR Starter | 10 | |
| Theuzz | XOR Properties | 15 | |
| Tsukishima_shiji | Resisting Bruteforce | 10 | |
| absimaman | Modular Arithmetic 2 | 20 | |
| smichi | ASCII | 5 | |
| mark14 | Bytes and Big Integers | 10 | |
| bhanuPathak | Bytes and Big Integers | 10 | |
| nsdcode | Chinese Remainder Theorem | 40 | |
| absimaman | Modular Arithmetic 1 | 20 | |
| amirediluly | Symmetry | 50 | |
| SadInfinite | XOR Starter | 10 | |
| Tsukishima_shiji | Keyed Permutations | 5 | |
| SadInfinite | Hex | 5 | |
| amirediluly | Flipping Cookie | 60 | |
| SadInfinite | ASCII | 5 | |
| Hal0 | Base64 | 10 | |
| 290010 | Jack's Birthday Hash | 20 | |
| yousseftr03 | Finding Flags | 2 | |
| lid | Curveball | 100 | |
| smichi | Great Snakes | 3 |
You are now level Current level