| Date | User | Challenge | Score |
| farahsrw | Hex | 5 | |
| farahsrw | ASCII | 5 | |
| farahsrw | Great Snakes | 3 | |
| up_chs | Modular Square Root | 35 | |
| cuongsl | Round Keys | 20 | |
| k7_exe | Greatest Common Divisor | 15 | |
| farahsrw | Finding Flags | 2 | |
| k7_exe | Lemur XOR | 40 | |
| TheRJnator | XOR Properties | 15 | |
| k7_exe | You either know, XOR you don't | 30 | |
| k7_exe | Favourite byte | 20 | |
| k7_exe | XOR Properties | 15 | |
| k7_exe | XOR Starter | 10 | |
| ezionoir | Flipping Cookie | 60 | |
| k7_exe | Network Attacks | 5 | |
| AT42110 | Structure of AES | 15 | |
| k7_exe | Great Snakes | 3 | |
| k7_exe | Finding Flags | 2 | |
| qthang | Greatest Common Divisor | 15 | |
| F0rhex | Keyed Permutations | 5 | |
| dacashew | Resisting Bruteforce | 10 | |
| Grooninium | Great Snakes | 3 | |
| dacashew | Keyed Permutations | 5 | |
| F0rhex | Modular Binomials | 80 | |
| AT42110 | Resisting Bruteforce | 10 | |
| qthang | You either know, XOR you don't | 30 | |
| AT42110 | Keyed Permutations | 5 | |
| thegoat2 | Greatest Common Divisor | 15 | |
| ezionoir | ECB Oracle | 60 | |
| kc762394 | Diffusion through Permutation | 30 | |
| mahu | Modular Binomials | 80 | |
| waltonj | Bytes and Big Integers | 10 | |
| kc762394 | Confusion through Substitution | 25 | |
| leeannaa13 | Base64 | 10 | |
| ghaisan | Symmetry | 50 | |
| Billy1bob1joe11 | Bytes and Big Integers | 10 | |
| bE200 | Great Snakes | 3 | |
| Billy1bob1joe11 | Base64 | 10 | |
| F0rhex | Adrien's Signs | 80 | |
| waltonj | Base64 | 10 | |
| leeannaa13 | Hex | 5 | |
| F0rhex | Chinese Remainder Theorem | 40 | |
| ghaisan | Flipping Cookie | 60 | |
| waltonj | Hex | 5 | |
| bE200 | Finding Flags | 2 | |
| F0rhex | Modular Square Root | 35 | |
| wangfu | Resisting Bruteforce | 10 | |
| 4wutKall | XOR Properties | 15 | |
| Grooninium | Finding Flags | 2 | |
| panhrist | Factoring | 15 |
You are now level Current level