| Date | User | Challenge | Score |
| yuchi | Structure of AES | 15 | |
| wangfu | Privacy-Enhanced Mail? | 25 | |
| Brashkie | Great Snakes | 3 | |
| bubytbun | Confusion through Substitution | 25 | |
| SEaajnbn | Greatest Common Divisor | 15 | |
| Tybolddd | Great Snakes | 3 | |
| AlarmW | Structure of AES | 15 | |
| Tybolddd | Finding Flags | 2 | |
| Yw322 | Round Keys | 20 | |
| bubytbun | Round Keys | 20 | |
| maimaimaimaimai | Resisting Bruteforce | 10 | |
| bubytbun | Structure of AES | 15 | |
| parkjaemin | Lazy CBC | 60 | |
| hehe_haha | Structure of AES | 15 | |
| AlarmW | Resisting Bruteforce | 10 | |
| KilbaneISB | Round Keys | 20 | |
| Ameer474 | Round Keys | 20 | |
| AlarmW | Keyed Permutations | 5 | |
| JunhyeongShin | Passwords as Keys | 50 | |
| JacksonB09 | Round Keys | 20 | |
| bubytbun | Resisting Bruteforce | 10 | |
| parkjaemin | Flipping Cookie | 60 | |
| PAULoLoLoLy | Structure of AES | 15 | |
| KilbaneISB | Great Snakes | 3 | |
| bubytbun | Keyed Permutations | 5 | |
| KilbaneISB | Network Attacks | 5 | |
| parkjaemin | ECB Oracle | 60 | |
| Yw322 | Structure of AES | 15 | |
| Sameer123 | Flipping Cookie | 60 | |
| Sameer123 | ECB CBC WTF | 55 | |
| RyuFukushige | Finding Flags | 2 | |
| Sameer123 | ECB Oracle | 60 | |
| Ameer474 | Structure of AES | 15 | |
| Sameer123 | Passwords as Keys | 50 | |
| JacksonB09 | Structure of AES | 15 | |
| Sameer123 | Modes of Operation Starter | 15 | |
| Yw322 | Resisting Bruteforce | 10 | |
| Ameer474 | Resisting Bruteforce | 10 | |
| Yw322 | Keyed Permutations | 5 | |
| hehe_haha | Resisting Bruteforce | 10 | |
| Sameer123 | Bringing It All Together | 50 | |
| JunhyeongShin | Modes of Operation Starter | 15 | |
| kuromie | Modular Square Root | 35 | |
| parkjaemin | ECB CBC WTF | 55 | |
| Ameer474 | Keyed Permutations | 5 | |
| hehe_haha | Keyed Permutations | 5 | |
| Tyke2554 | Resisting Bruteforce | 10 | |
| yuchi | Resisting Bruteforce | 10 | |
| JacksonB09 | Resisting Bruteforce | 10 | |
| Matthias123123 | Resisting Bruteforce | 10 |
You are now level Current level