| Date | User | Challenge | Score |
| 50ulR3ap3r | You either know, XOR you don't | 30 | |
| 50ulR3ap3r | Favourite byte | 20 | |
| 50ulR3ap3r | XOR Properties | 15 | |
| mahmud | Triple DES | 60 | |
| 50ulR3ap3r | XOR Starter | 10 | |
| mahmud | Lazy CBC | 60 | |
| mahmud | Flipping Cookie | 60 | |
| mahmud | ECB Oracle | 60 | |
| mahmud | ECB CBC WTF | 55 | |
| 50ulR3ap3r | Bytes and Big Integers | 10 | |
| 50ulR3ap3r | Base64 | 10 | |
| 9tsrC_s | Network Attacks | 5 | |
| adnan64 | Finding Flags | 2 | |
| mahmud | Passwords as Keys | 50 | |
| mahmud | Modes of Operation Starter | 15 | |
| fininas | You either know, XOR you don't | 30 | |
| mahmud | Bringing It All Together | 50 | |
| mahmud | Diffusion through Permutation | 30 | |
| mahmud | Confusion through Substitution | 25 | |
| 9tsrC_s | Great Snakes | 3 | |
| mahmud | Round Keys | 20 | |
| A0xV4l0r14n | Hex | 5 | |
| 50ulR3ap3r | Hex | 5 | |
| mahmud | Structure of AES | 15 | |
| mahmud | Resisting Bruteforce | 10 | |
| mahmud | Keyed Permutations | 5 | |
| mahmud | Transparency | 50 | |
| mahmud | SSH Keys | 35 | |
| mahmud | CERTainly not | 30 | |
| 50ulR3ap3r | ASCII | 5 | |
| mahmud | Privacy-Enhanced Mail? | 25 | |
| mahmud | Modular Inverting | 25 | |
| MohamedMujahed | Exceptional Curves | 100 | |
| mahmud | Modular Arithmetic 2 | 20 | |
| mahmud | Modular Arithmetic 1 | 20 | |
| mahmud | Extended GCD | 20 | |
| mahmud | Greatest Common Divisor | 15 | |
| mahmud | Lemur XOR | 40 | |
| 9tsrC_s | Finding Flags | 2 | |
| mahmud | You either know, XOR you don't | 30 | |
| mahmud | Favourite byte | 20 | |
| mahmud | XOR Properties | 15 | |
| Aloutrance | Successive Powers | 60 | |
| mahmud | XOR Starter | 10 | |
| Anass67 | Fast Primes | 75 | |
| 50ulR3ap3r | Great Snakes | 3 | |
| acamq | You either know, XOR you don't | 30 | |
| A0xV4l0r14n | ASCII | 5 | |
| OutOfTheWell | Square Eyes | 35 | |
| Sadrazamv4 | Great Snakes | 3 |
You are now level Current level