| Date | User | Challenge | Score |
| p1 | Merkle Trees | 25 | |
| p1 | Jack's Birthday Confusion | 30 | |
| p1 | Jack's Birthday Hash | 20 | |
| p1 | Real Eisenstein | 150 | |
| p1 | Prime and Prejudice | 200 | |
| kenkuts | Base64 | 10 | |
| khaledbenhani | XOR Properties | 15 | |
| p1 | Ellipse Curve Cryptography | 125 | |
| p1 | Roll your Own | 125 | |
| p1 | Cofactor Cofantasy | 150 | |
| ziwonszi | Bytes and Big Integers | 10 | |
| Marchet_91 | Pad Thai | 80 | |
| SodaCodesMMD | Modes of Operation Starter | 15 | |
| Patr1ckf | You either know, XOR you don't | 30 | |
| Grupo9_Mate | Salty | 20 | |
| xkai90 | XOR Properties | 15 | |
| p1 | Unencryptable | 125 | |
| p1 | No Way Back Home | 100 | |
| p1 | Broken RSA | 100 | |
| p1 | Modular Binomials | 80 | |
| p1 | Adrien's Signs | 80 | |
| Grupo9_Mate | Square Eyes | 35 | |
| p1 | Successive Powers | 60 | |
| p1 | Common Ground | 75 | |
| p1 | Chinese Remainder Theorem | 40 | |
| p1 | Modular Square Root | 35 | |
| p1 | Legendre Symbol | 35 | |
| p1 | Quadratic Residues | 25 | |
| p1 | Transparency | 50 | |
| p1 | Lemur XOR | 40 | |
| p1 | Encoding Challenge | 40 | |
| p1 | SSH Keys | 35 | |
| p1 | CERTainly not | 30 | |
| p1 | Privacy-Enhanced Mail? | 25 | |
| p1 | Modular Inverting | 25 | |
| p1 | Modular Arithmetic 2 | 20 | |
| p1 | Modular Arithmetic 1 | 20 | |
| p1 | Extended GCD | 20 | |
| p1 | Greatest Common Divisor | 15 | |
| p1 | You either know, XOR you don't | 30 | |
| p1 | Favourite byte | 20 | |
| p1 | XOR Properties | 15 | |
| p1 | XOR Starter | 10 | |
| p1 | Bytes and Big Integers | 10 | |
| p1 | Base64 | 10 | |
| p1 | Hex | 5 | |
| p1 | ASCII | 5 | |
| p1 | Network Attacks | 5 | |
| p1 | Great Snakes | 3 | |
| p1 | Finding Flags | 2 |
You are now level Current level