| Date | User | Challenge | Score |
| obahya | ASCII | 5 | |
| obahya | Great Snakes | 3 | |
| vothanhnamnn | Finding Flags | 2 | |
| obahya | Finding Flags | 2 | |
| 1tsRyd3r | Ron was Wrong, Whit is Right | 90 | |
| z8v5nr4d | Bean Counter | 60 | |
| phenol | Resisting Bruteforce | 10 | |
| Retro16 | Chinese Remainder Theorem | 40 | |
| jkendall | ECB Oracle | 60 | |
| Kanad3 | Generators of Groups | 20 | |
| cryptokiwi | Modular Arithmetic 1 | 20 | |
| Retro16 | Modular Square Root | 35 | |
| Cryptocool | Mister Saplins The Prover | 125 | |
| sowon | XOR Properties | 15 | |
| Cryptocool | Let's Prove It Again | 175 | |
| phenol | Keyed Permutations | 5 | |
| heeheeheehar | Noise Free | 40 | |
| Kicks299 | Privacy-Enhanced Mail? | 25 | |
| annaliisa | Greatest Common Divisor | 15 | |
| 0xmvmd | Hex | 5 | |
| learnercryptohac | ECB Oracle | 60 | |
| Doog42 | ASCII | 5 | |
| 0xmvmd | ASCII | 5 | |
| Retro16 | Legendre Symbol | 35 | |
| Doog42 | Great Snakes | 3 | |
| Doog42 | Finding Flags | 2 | |
| Retro16 | Quadratic Residues | 25 | |
| yrighting | Privacy-Enhanced Mail? | 25 | |
| Retro16 | Network Attacks | 5 | |
| OKlllng | Adrien's Signs | 80 | |
| 0xmvmd | Great Snakes | 3 | |
| drnikos | Bean Counter | 60 | |
| Aryaethn | Too Many Errors | 100 | |
| 0xmvmd | Finding Flags | 2 | |
| annaliisa | You either know, XOR you don't | 30 | |
| z8v5nr4d | Symmetry | 50 | |
| nathanmung | Hex | 5 | |
| 1tsRyd3r | Marin's Secrets | 50 | |
| Retro16 | Great Snakes | 3 | |
| knkl384038 | Quadratic Residues | 25 | |
| hasuke | Legendre Symbol | 35 | |
| Retro16 | Finding Flags | 2 | |
| Quine | Computing Public Values | 25 | |
| lilyjane | Quadratic Residues | 25 | |
| peridot0x | Manyprime | 40 | |
| OKlllng | Chinese Remainder Theorem | 40 | |
| sowon | XOR Starter | 10 | |
| z8v5nr4d | Flipping Cookie | 60 | |
| AndyVale | Stream of Consciousness | 80 | |
| Indra45 | Base64 | 10 |
You are now level Current level