| Date | User | Challenge | Score |
| Halois | Too Honest | 50 | |
| andre33 | Favourite byte | 20 | |
| andre33 | XOR Properties | 15 | |
| Blixow | Backpack Cryptography | 120 | |
| andre33 | XOR Starter | 10 | |
| andre33 | Bytes and Big Integers | 10 | |
| avm | Logon Zero | 80 | |
| Halois | Non-Interactive | 35 | |
| andre33 | Base64 | 10 | |
| feynhat | Gram Schmidt | 30 | |
| PAWOS | Invariant | 250 | |
| isobare | XOR Starter | 10 | |
| bjones | Finding Flags | 2 | |
| proclivity | Great Snakes | 3 | |
| Halois | Honest Verifier Zero Knowledge | 30 | |
| PAWOS | Prime and Prejudice | 200 | |
| Skyly | XOR Starter | 10 | |
| PAWOS | RSA or HMAC? Part 2 | 100 | |
| isobare | Bytes and Big Integers | 10 | |
| Halois | Special Soundness | 25 | |
| proclivity | Finding Flags | 2 | |
| n40y | Bringing It All Together | 50 | |
| Nimadli | Square Eyes | 35 | |
| michpats96 | Hex | 5 | |
| Kln | Hex | 5 | |
| michpats96 | ASCII | 5 | |
| sajadhamza | ASCII | 5 | |
| SuPeRPi9 | Salty | 20 | |
| michpats96 | Great Snakes | 3 | |
| Nimadli | Monoprime | 30 | |
| michpats96 | Finding Flags | 2 | |
| SuPeRPi9 | Manyprime | 40 | |
| sajadhamza | Great Snakes | 3 | |
| sajadhamza | Finding Flags | 2 | |
| Kln | ASCII | 5 | |
| iano0s1 | Great Snakes | 3 | |
| iano0s1 | Finding Flags | 2 | |
| FazeV1nce | Finding Flags | 2 | |
| Kln | Great Snakes | 3 | |
| Guzlyach | Confusion through Substitution | 25 | |
| Kln | Finding Flags | 2 | |
| SpongeBob369 | Adrien's Signs | 80 | |
| Nimadli | Inferius Prime | 30 | |
| sheerwood | Efficient Exchange | 50 | |
| mahmoud000 | Modular Inverting | 25 | |
| Fluvfy | Quadratic Residues | 25 | |
| Danonek | Quadratic Residues | 25 | |
| exoq | Square Eyes | 35 | |
| mahmoud000 | Modular Arithmetic 2 | 20 | |
| sheerwood | Curves and Logs | 40 |
You are now level Current level