| Date | User | Challenge | Score |
| flower2 | Euler's Totient | 20 | |
| coupi | Hex | 5 | |
| flower2 | Public Keys | 15 | |
| tlvresearch | Modular Square Root | 35 | |
| NonceSensei | Private Keys | 20 | |
| Glauco | Flipping Cookie | 60 | |
| NonceSensei | Euler's Totient | 20 | |
| EOne | André Encoding | 80 | |
| brunolim4 | Too Honest | 50 | |
| NonceSensei | Public Keys | 15 | |
| Glauco | ECB CBC WTF | 55 | |
| grazkaa | No Way Back Home | 100 | |
| flower2 | Modular Exponentiation | 10 | |
| MaxAzar | Legendre Symbol | 35 | |
| KHUCrypt | Base64 | 10 | |
| creep3r | Bytes and Big Integers | 10 | |
| NonceSensei | Modular Exponentiation | 10 | |
| ck0d | Extended GCD | 20 | |
| ck0d | Greatest Common Divisor | 15 | |
| tui101 | Greatest Common Divisor | 15 | |
| Seventt | Logon Zero | 80 | |
| StrangerTM | Bytes and Big Integers | 10 | |
| MaxAzar | Quadratic Residues | 25 | |
| Bonolori404 | Let's Decrypt | 80 | |
| tlvresearch | Legendre Symbol | 35 | |
| StrangerTM | Base64 | 10 | |
| creep3r | Base64 | 10 | |
| ck0d | Favourite byte | 20 | |
| aymane | Resisting Bruteforce | 10 | |
| creep3r | Hex | 5 | |
| ck0d | XOR Properties | 15 | |
| creep3r | ASCII | 5 | |
| StrangerTM | Hex | 5 | |
| StrangerTM | ASCII | 5 | |
| aymane | Keyed Permutations | 5 | |
| Bonolori404 | Signing Server | 60 | |
| coupi | ASCII | 5 | |
| SvJ0049 | Base64 | 10 | |
| ck0d | XOR Starter | 10 | |
| 1tsRyd3r | LWE Background | 5 | |
| SvJ0049 | Hex | 5 | |
| avenger1234 | ASCII | 5 | |
| StrangerTM | Network Attacks | 5 | |
| aymane | Modular Inverting | 25 | |
| avenger1234 | Great Snakes | 3 | |
| aymane | Modular Arithmetic 2 | 20 | |
| avenger1234 | Finding Flags | 2 | |
| ck0d | Bytes and Big Integers | 10 | |
| SvJ0049 | ASCII | 5 | |
| SvJ0049 | Great Snakes | 3 |
You are now level Current level