| Date | User | Challenge | Score |
| ntnuw | Round Keys | 20 | |
| ntnuw | Structure of AES | 15 | |
| ntnuw | Resisting Bruteforce | 10 | |
| cavazinf | Let's Prove It Again | 175 | |
| cybersensei90 | Hex | 5 | |
| ntnuw | Keyed Permutations | 5 | |
| joker123 | Hex | 5 | |
| MADRID2014 | Finding Flags | 2 | |
| flooeg | Private Keys | 20 | |
| joker123 | ASCII | 5 | |
| L3op4rd | Network Attacks | 5 | |
| monk000 | Chinese Remainder Theorem | 40 | |
| monk000 | Modular Square Root | 35 | |
| monk000 | Legendre Symbol | 35 | |
| PranavK0804 | XOR Starter | 10 | |
| chelinh | Manyprime | 40 | |
| flooeg | Euler's Totient | 20 | |
| hanhatminh8916 | Finding Flags | 2 | |
| Tu4nSec2325 | Finding Flags | 2 | |
| flooeg | Public Keys | 15 | |
| PranavK0804 | Bytes and Big Integers | 10 | |
| flooeg | Modular Exponentiation | 10 | |
| Myra0106 | Encoding Challenge | 40 | |
| eziz1001 | Great Snakes | 3 | |
| eziz1001 | Finding Flags | 2 | |
| suiya | Great Snakes | 3 | |
| suiya | Finding Flags | 2 | |
| PranavK0804 | Base64 | 10 | |
| PranavK0804 | Hex | 5 | |
| PranavK0804 | ASCII | 5 | |
| temp1808 | Extended GCD | 20 | |
| temp1808 | Greatest Common Divisor | 15 | |
| cmd0 | Great Snakes | 3 | |
| cmd0 | Finding Flags | 2 | |
| aabhash_gautam10 | XOR Properties | 15 | |
| MhmdEbead | XOR Starter | 10 | |
| Anuj | Great Snakes | 3 | |
| tenkay | Extended GCD | 20 | |
| joker123 | Great Snakes | 3 | |
| joker123 | Finding Flags | 2 | |
| sUb1n_mdbh | Finding Flags | 2 | |
| aabhash_gautam10 | XOR Starter | 10 | |
| ShadhinIslam | XOR Starter | 10 | |
| Anuj | Finding Flags | 2 | |
| KuyangKutai | You either know, XOR you don't | 30 | |
| yusf | ASCII | 5 | |
| a5a7 | Computing Shared Secrets | 30 | |
| a5a7 | Computing Public Values | 25 | |
| a5a7 | Generators of Groups | 20 | |
| yusf | Great Snakes | 3 |
You are now level Current level