| Date | User | Challenge | Score |
| vtytar | Logon Zero | 80 | |
| might_2 | ECB CBC WTF | 55 | |
| might_2 | ECB Oracle | 60 | |
| ssbnn | Bean Counter | 60 | |
| mips32r2 | ASCII | 5 | |
| Lilinta | Factoring | 15 | |
| Dar1us | Private Keys | 20 | |
| Dar1us | Euler's Totient | 20 | |
| ssbnn | Symmetry | 50 | |
| ssbnn | Flipping Cookie | 60 | |
| N5B_5188 | Privacy-Enhanced Mail? | 25 | |
| N5B_5188 | Modular Inverting | 25 | |
| N5B_5188 | Modular Arithmetic 2 | 20 | |
| N5B_5188 | Modular Arithmetic 1 | 20 | |
| N5B_5188 | Extended GCD | 20 | |
| AkaiKitsune_2107 | Round Keys | 20 | |
| N5B_5188 | Greatest Common Divisor | 15 | |
| N5B_5188 | Lemur XOR | 40 | |
| JakeFromCVS | Greatest Common Divisor | 15 | |
| ssbnn | ECB CBC WTF | 55 | |
| N5B_5188 | You either know, XOR you don't | 30 | |
| N5B_5188 | Favourite byte | 20 | |
| N5B_5188 | XOR Properties | 15 | |
| N5B_5188 | XOR Starter | 10 | |
| KietwhUIT | Everything is Still Big | 100 | |
| item4150 | Base64 | 10 | |
| N5B_5188 | Encoding Challenge | 40 | |
| N5B_5188 | Bytes and Big Integers | 10 | |
| caledt | Favourite byte | 20 | |
| JakeFromCVS | You either know, XOR you don't | 30 | |
| might_2 | Passwords as Keys | 50 | |
| N5B_5188 | Base64 | 10 | |
| caledt | XOR Properties | 15 | |
| might_2 | Modes of Operation Starter | 15 | |
| item4150 | Hex | 5 | |
| KietwhUIT | Crossed Wires | 100 | |
| N5B_5188 | Hex | 5 | |
| item4150 | ASCII | 5 | |
| IvyMumbua | Modular Binomials | 80 | |
| N5B_5188 | ASCII | 5 | |
| item4150 | Network Attacks | 5 | |
| might_2 | Bringing It All Together | 50 | |
| KietwhUIT | Everything is Big | 70 | |
| might_2 | Diffusion through Permutation | 30 | |
| N5B_5188 | Network Attacks | 5 | |
| keu | Finding Flags | 2 | |
| IvyMumbua | Adrien's Signs | 80 | |
| N5B_5188 | Great Snakes | 3 | |
| N5B_5188 | Finding Flags | 2 | |
| might_2 | Confusion through Substitution | 25 |
You are now level Current level