| Date | User | Challenge | Score |
| magda_almpani | Round Keys | 20 | |
| ho_ongvyy | Confusion through Substitution | 25 | |
| smortMan | Great Snakes | 3 | |
| Zaylaa | Private Keys | 20 | |
| smortMan | Finding Flags | 2 | |
| Zaylaa | Euler's Totient | 20 | |
| Emorrik | ECB Oracle | 60 | |
| Oskar404 | Modes of Operation Starter | 15 | |
| Emorrik | Passwords as Keys | 50 | |
| Zaylaa | Public Keys | 15 | |
| Emorrik | Modes of Operation Starter | 15 | |
| M0xX | CERTainly not | 30 | |
| Emorrik | Bringing It All Together | 50 | |
| Emorrik | Diffusion through Permutation | 30 | |
| Emorrik | Confusion through Substitution | 25 | |
| Zaylaa | Modular Exponentiation | 10 | |
| chasekstasek | Structure of AES | 15 | |
| Emorrik | Round Keys | 20 | |
| Emorrik | Structure of AES | 15 | |
| Emorrik | Resisting Bruteforce | 10 | |
| Emorrik | Keyed Permutations | 5 | |
| M0xX | Privacy-Enhanced Mail? | 25 | |
| Emorrik | Modular Binomials | 80 | |
| Emorrik | Adrien's Signs | 80 | |
| Emorrik | Chinese Remainder Theorem | 40 | |
| Emorrik | Modular Square Root | 35 | |
| Emorrik | Legendre Symbol | 35 | |
| caligo | You either know, XOR you don't | 30 | |
| M0xX | Transparency | 50 | |
| Sabrinadewinda | Great Snakes | 3 | |
| syndir | Point Negation | 10 | |
| chasekstasek | Keyed Permutations | 5 | |
| Emorrik | Quadratic Residues | 25 | |
| Emorrik | Modular Inverting | 25 | |
| Emorrik | Modular Arithmetic 2 | 20 | |
| Emorrik | Modular Arithmetic 1 | 20 | |
| Emorrik | Extended GCD | 20 | |
| Emorrik | Greatest Common Divisor | 15 | |
| Emorrik | You either know, XOR you don't | 30 | |
| Emorrik | Favourite byte | 20 | |
| Emorrik | XOR Properties | 15 | |
| Emorrik | XOR Starter | 10 | |
| Emorrik | Bytes and Big Integers | 10 | |
| Emorrik | Base64 | 10 | |
| Emorrik | Hex | 5 | |
| Emorrik | ASCII | 5 | |
| Emorrik | Great Snakes | 3 | |
| Emorrik | Finding Flags | 2 | |
| Ter3Sni | Point Negation | 10 | |
| swan_nessie | Cofactor Cofantasy | 150 |
You are now level Current level