| Date | User | Challenge | Score |
| Wuming0423 | Modular Square Root | 35 | |
| CryptoBro | Modes of Operation Starter | 15 | |
| kalko | Bytes and Big Integers | 10 | |
| Antoine_crypto | Structure of AES | 15 | |
| broman | Confusion through Substitution | 25 | |
| deng | You either know, XOR you don't | 30 | |
| Antoine_crypto | Resisting Bruteforce | 10 | |
| Antoine_crypto | Keyed Permutations | 5 | |
| emr | Quadratic Residues | 25 | |
| Capybara | Modular Inverting | 25 | |
| jelly_ace | Finding Flags | 2 | |
| Capybara | Modular Arithmetic 2 | 20 | |
| nsbank | Bringing It All Together | 50 | |
| Capybara | Modular Arithmetic 1 | 20 | |
| abhinav005 | Great Snakes | 3 | |
| Capybara | Extended GCD | 20 | |
| abhinav005 | Finding Flags | 2 | |
| hz9x | Favourite byte | 20 | |
| Capybara | Greatest Common Divisor | 15 | |
| WillyGanst | Base64 | 10 | |
| Capybara | Lemur XOR | 40 | |
| hz9x | XOR Properties | 15 | |
| broman | Round Keys | 20 | |
| hz9x | XOR Starter | 10 | |
| WillyGanst | Hex | 5 | |
| Capybara | You either know, XOR you don't | 30 | |
| WillyGanst | ASCII | 5 | |
| nsbank | Diffusion through Permutation | 30 | |
| andutu0 | Real Eisenstein | 150 | |
| Aethelis | Base64 | 10 | |
| st4rl1 | Base64 | 10 | |
| WillyGanst | Great Snakes | 3 | |
| norahamu | XOR Properties | 15 | |
| Capybara | Favourite byte | 20 | |
| KongBai | Passwords as Keys | 50 | |
| WillyGanst | Finding Flags | 2 | |
| st4rl1 | Hex | 5 | |
| Capybara | XOR Properties | 15 | |
| nsbank | Confusion through Substitution | 25 | |
| st4rl1 | ASCII | 5 | |
| Nyanmel | XOR Starter | 10 | |
| st4rl1 | Great Snakes | 3 | |
| Mellivora | Base64 | 10 | |
| st4rl1 | Finding Flags | 2 | |
| Nyanmel | Bytes and Big Integers | 10 | |
| KongBai | Modes of Operation Starter | 15 | |
| Capybara | XOR Starter | 10 | |
| PR3D470R_007 | XOR Starter | 10 | |
| nsbank | Round Keys | 20 | |
| Capybara | Bytes and Big Integers | 10 |
You are now level Current level