| Date | User | Challenge | Score |
| MohammedAnaam12 | Great Snakes | 3 | |
| Shadow4011 | XOR Starter | 10 | |
| Shadow4011 | Bytes and Big Integers | 10 | |
| surf_excel | Crossed Wires | 100 | |
| MohammedAnaam12 | Finding Flags | 2 | |
| surf_excel | Resisting Bruteforce | 10 | |
| surf_excel | Keyed Permutations | 5 | |
| Aristotle | Finding Flags | 2 | |
| surf_excel | ECB CBC WTF | 55 | |
| surf_excel | Bringing It All Together | 50 | |
| surf_excel | Diffusion through Permutation | 30 | |
| surf_excel | Confusion through Substitution | 25 | |
| surf_excel | Round Keys | 20 | |
| surf_excel | Structure of AES | 15 | |
| surf_excel | Successive Powers | 60 | |
| surf_excel | Modular Square Root | 35 | |
| surf_excel | Chinese Remainder Theorem | 40 | |
| kozz | XOR Starter | 10 | |
| C4tsinthestreet | Finding Flags | 2 | |
| surf_excel | Modulus Inutilis | 50 | |
| surf_excel | Salty | 20 | |
| surf_excel | Square Eyes | 35 | |
| surf_excel | Manyprime | 40 | |
| surf_excel | Inferius Prime | 30 | |
| surf_excel | Monoprime | 30 | |
| Shadow4011 | Base64 | 10 | |
| surf_excel | RSA Signatures | 25 | |
| surf_excel | RSA Decryption | 20 | |
| surf_excel | Private Keys | 20 | |
| surf_excel | Euler's Totient | 20 | |
| surf_excel | Public Keys | 15 | |
| surf_excel | Modular Exponentiation | 10 | |
| toaru_k | Montgomery's Ladder | 40 | |
| surf_excel | Transparency | 50 | |
| surf_excel | SSH Keys | 35 | |
| surf_excel | CERTainly not | 30 | |
| surf_excel | Privacy-Enhanced Mail? | 25 | |
| mfreedom_neo | Lemur XOR | 40 | |
| surf_excel | Lemur XOR | 40 | |
| Shadow4011 | Hex | 5 | |
| surf_excel | Encoding Challenge | 40 | |
| surf_excel | Network Attacks | 5 | |
| saro | LWE High Bits Message | 15 | |
| vizz | Lemur XOR | 40 | |
| DDDDmmmm | Legendre Symbol | 35 | |
| vizz | You either know, XOR you don't | 30 | |
| Biswas | Modular Arithmetic 1 | 20 | |
| Ba1sars | Modes of Operation Starter | 15 | |
| vizz | Favourite byte | 20 | |
| vizz | XOR Properties | 15 |
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