| Date | User | Challenge | Score |
| JacobLu3141 | Modes of Operation Starter | 15 | |
| pin3apple07 | A Twisted Mind | 80 | |
| IgnAto | XOR Starter | 10 | |
| jeydpbb | Broken RSA | 100 | |
| Ariane29theGOAT | Greatest Common Divisor | 15 | |
| JacobLu3141 | Bringing It All Together | 50 | |
| FLU | Chinese Remainder Theorem | 40 | |
| yaef | Finding Flags | 2 | |
| fucla | Adrien's Signs | 80 | |
| InspectorPing | Great Snakes | 3 | |
| Fisher57 | ASCII | 5 | |
| Dagger7398 | XOR Properties | 15 | |
| jeydpbb | CERTainly not | 30 | |
| InspectorPing | Finding Flags | 2 | |
| Fisher57 | Great Snakes | 3 | |
| aj1002 | Greatest Common Divisor | 15 | |
| Fisher57 | Finding Flags | 2 | |
| jeydpbb | Privacy-Enhanced Mail? | 25 | |
| shmdotexe | Bytes and Big Integers | 10 | |
| emanu93 | RSA Signatures | 25 | |
| Dagger7398 | XOR Starter | 10 | |
| aj1002 | You either know, XOR you don't | 30 | |
| emanu93 | RSA Decryption | 20 | |
| NOSIC | You either know, XOR you don't | 30 | |
| MidoS3d | Find the Lattice | 100 | |
| irritable_hacker | Curveball | 100 | |
| shmdotexe | Base64 | 10 | |
| blackthorne | Favourite byte | 20 | |
| shmdotexe | Hex | 5 | |
| shmdotexe | ASCII | 5 | |
| shmdotexe | Network Attacks | 5 | |
| aj1002 | Favourite byte | 20 | |
| Dagger7398 | Bytes and Big Integers | 10 | |
| aj1002 | XOR Properties | 15 | |
| Dagger7398 | Base64 | 10 | |
| NOSIC | Favourite byte | 20 | |
| emanu93 | Private Keys | 20 | |
| Xela12 | Quadratic Residues | 25 | |
| shmdotexe | Great Snakes | 3 | |
| Dagger7398 | Hex | 5 | |
| NOSIC | XOR Properties | 15 | |
| shmdotexe | Finding Flags | 2 | |
| Dagger7398 | ASCII | 5 | |
| emanu93 | Euler's Totient | 20 | |
| Dagger7398 | Great Snakes | 3 | |
| Dagger7398 | Finding Flags | 2 | |
| aj1002 | XOR Starter | 10 | |
| NOSIC | XOR Starter | 10 | |
| polybius | Bytes and Big Integers | 10 | |
| aj1002 | Bytes and Big Integers | 10 |
You are now level Current level