| Date | User | Challenge | Score |
| plebware | Round Keys | 20 | |
| 0xSonic | You either know, XOR you don't | 30 | |
| hiswui | PriMeD5 | 100 | |
| rifasafeershah | XOR Starter | 10 | |
| NKATechnologies | Non-Interactive | 35 | |
| NKATechnologies | Honest Verifier Zero Knowledge | 30 | |
| NKATechnologies | Special Soundness | 25 | |
| NKATechnologies | Proofs of Knowledge | 20 | |
| NKATechnologies | ZKP Introduction | 5 | |
| stonelakecat | ASCII | 5 | |
| lordvoldmort | Bytes and Big Integers | 10 | |
| hasuke | Export-grade | 100 | |
| rifasafeershah | Bytes and Big Integers | 10 | |
| Wassel | Network Attacks | 5 | |
| alyce | Passwords as Keys | 50 | |
| Wassel | Great Snakes | 3 | |
| Wassel | Finding Flags | 2 | |
| alyce | You either know, XOR you don't | 30 | |
| martin200261 | ASCII | 5 | |
| alyce | Favourite byte | 20 | |
| alyce | XOR Properties | 15 | |
| alyce | XOR Starter | 10 | |
| lordvoldmort | Base64 | 10 | |
| alyce | Bytes and Big Integers | 10 | |
| mib | ECB CBC WTF | 55 | |
| ceydasel3 | Hex | 5 | |
| alyce | Base64 | 10 | |
| martin200261 | Great Snakes | 3 | |
| WelshDragon | Bean Counter | 60 | |
| alyce | Hex | 5 | |
| alyce | ASCII | 5 | |
| martin200261 | Finding Flags | 2 | |
| alyce | Great Snakes | 3 | |
| lordvoldmort | Hex | 5 | |
| gas42 | Finding Flags | 2 | |
| WelshDragon | Symmetry | 50 | |
| 7hamadX | Base64 | 10 | |
| WelshDragon | Flipping Cookie | 60 | |
| lordvoldmort | ASCII | 5 | |
| lordvoldmort | Great Snakes | 3 | |
| WelshDragon | ECB CBC WTF | 55 | |
| Taslimun | Background Reading | 5 | |
| Almon11 | Bytes and Big Integers | 10 | |
| ceydasel3 | ASCII | 5 | |
| alyce | Modes of Operation Starter | 15 | |
| Tal | Great Snakes | 3 | |
| lordvoldmort | Finding Flags | 2 | |
| Almon11 | Base64 | 10 | |
| wiknwo | Modular Inverting | 25 | |
| Almon11 | Hex | 5 |
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