| Date | User | Challenge | Score |
| toan2k4 | Greatest Common Divisor | 15 | |
| KamClam | Modular Inverting | 25 | |
| j_m | The Matrix Reloaded | 100 | |
| pypy | Deriving Symmetric Keys | 40 | |
| KamClam | Modular Arithmetic 2 | 20 | |
| dlhxfy | Greatest Common Divisor | 15 | |
| j_m | The Matrix | 75 | |
| dlhxfy | You either know, XOR you don't | 30 | |
| best_try | XOR Starter | 10 | |
| j_m | Script Kiddie | 70 | |
| dlhxfy | Favourite byte | 20 | |
| dlhxfy | XOR Properties | 15 | |
| rad0xus | ASCII | 5 | |
| rad0xus | Great Snakes | 3 | |
| KamClam | Modular Arithmetic 1 | 20 | |
| sameth | Base64 | 10 | |
| KamClam | Extended GCD | 20 | |
| zzm | XOR Properties | 15 | |
| 0xs1nr | Sharks on the Wire | 10 | |
| sameth | Hex | 5 | |
| dlhxfy | XOR Starter | 10 | |
| handoko | Efficient Exchange | 50 | |
| YWzhong | Symmetry | 50 | |
| grazkaa | Megalomaniac 3 | 120 | |
| zzm | XOR Starter | 10 | |
| KamClam | Greatest Common Divisor | 15 | |
| Learn_From_Nyamu | ECB Oracle | 60 | |
| best_try | Bytes and Big Integers | 10 | |
| kajkh | Finding Flags | 2 | |
| Euphorie_Q | Confusion through Substitution | 25 | |
| Linda_JMXS | Keyed Permutations | 5 | |
| Euphorie_Q | Round Keys | 20 | |
| hanahiennguyen | Logon Zero | 80 | |
| 0xs1nr | Secure Protocols | 5 | |
| MD_333 | Base64 | 10 | |
| handoko | Curves and Logs | 40 | |
| Euphorie_Q | Structure of AES | 15 | |
| sameth | ASCII | 5 | |
| mboh2 | ASCII | 5 | |
| k3v1n4rsk | Finding Flags | 2 | |
| sameth | Great Snakes | 3 | |
| xccnnaino | Exceptional Curves | 100 | |
| liangmeigang | Exceptional Curves | 100 | |
| MD_333 | Hex | 5 | |
| mboh2 | Great Snakes | 3 | |
| _ndy | Finding Flags | 2 | |
| sameth | Finding Flags | 2 | |
| MD_333 | ASCII | 5 | |
| mboh2 | Finding Flags | 2 | |
| kaizero | Quadratic Residues | 25 |
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