| Date | User | Challenge | Score |
| tsnider | Finding Flags | 2 | |
| phantomguy | You either know, XOR you don't | 30 | |
| Prachi_Baghel | Lemur XOR | 40 | |
| UtalTIPE | You either know, XOR you don't | 30 | |
| Prachi_Baghel | You either know, XOR you don't | 30 | |
| adolowy | SSH Keys | 35 | |
| Zuzix | Base64 | 10 | |
| Prachi_Baghel | Favourite byte | 20 | |
| tsnider | Private Keys | 20 | |
| Prachi_Baghel | XOR Properties | 15 | |
| tsnider | Euler's Totient | 20 | |
| Prachi_Baghel | XOR Starter | 10 | |
| Zhacker | You either know, XOR you don't | 30 | |
| Wali | Bytes and Big Integers | 10 | |
| adolowy | CERTainly not | 30 | |
| ABCSlime | ECB CBC WTF | 55 | |
| Zuzix | Hex | 5 | |
| tsnider | Public Keys | 15 | |
| Brave_potato9 | Greatest Common Divisor | 15 | |
| Azeeee | Legendre Symbol | 35 | |
| tsnider | Modular Exponentiation | 10 | |
| Prachi_Baghel | Real Eisenstein | 150 | |
| spidey2609 | Finding Flags | 2 | |
| Eliott | Broken RSA | 100 | |
| Brave_potato9 | You either know, XOR you don't | 30 | |
| Prachi_Baghel | Unencryptable | 125 | |
| Zuzix | ASCII | 5 | |
| Vather | ASCII | 5 | |
| Pkv123 | The Matrix Revolutions | 125 | |
| adolowy | Privacy-Enhanced Mail? | 25 | |
| Vather | Great Snakes | 3 | |
| Brave_potato9 | Favourite byte | 20 | |
| ibaadali2109 | Network Attacks | 5 | |
| Vather | Finding Flags | 2 | |
| stellev | Transparency | 50 | |
| Prachi_Baghel | Ellipse Curve Cryptography | 125 | |
| kadev | Lemur XOR | 40 | |
| Pkv123 | The Matrix | 75 | |
| Brave_potato9 | XOR Properties | 15 | |
| Ishant | Round Keys | 20 | |
| i5ida5 | XOR Starter | 10 | |
| Pkv123 | Script Kiddie | 70 | |
| kadev | You either know, XOR you don't | 30 | |
| Pkv123 | Deriving Symmetric Keys | 40 | |
| kadev | Favourite byte | 20 | |
| Pkv123 | Computing Shared Secrets | 30 | |
| Pkv123 | Computing Public Values | 25 | |
| Pkv123 | Generators of Groups | 20 | |
| Pkv123 | Working with Fields | 10 | |
| maletos | Great Snakes | 3 |
You are now level Current level