| Date | User | Challenge | Score |
| davidcgmontreal | Hex | 5 | |
| risbaah | Favourite byte | 20 | |
| kzzm | You either know, XOR you don't | 30 | |
| davidcgmontreal | ASCII | 5 | |
| risbaah | XOR Properties | 15 | |
| kushnerykpavlo | XOR Properties | 15 | |
| risbaah | XOR Starter | 10 | |
| Despoina | XOR Starter | 10 | |
| shadowguy | Modulus Inutilis | 50 | |
| davidcgmontreal | Great Snakes | 3 | |
| Kospatt | Logon Zero | 80 | |
| risbaah | Bytes and Big Integers | 10 | |
| risbaah | Base64 | 10 | |
| shadowguy | Salty | 20 | |
| risbaah | Hex | 5 | |
| risbaah | ASCII | 5 | |
| risbaah | Great Snakes | 3 | |
| risbaah | Finding Flags | 2 | |
| kzzm | Favourite byte | 20 | |
| Mateixx1 | ECB Oracle | 60 | |
| Sakura_luo | XOR Starter | 10 | |
| greg81 | Great Snakes | 3 | |
| greg81 | Finding Flags | 2 | |
| T0x1c | Broken RSA | 100 | |
| grapesea | Flipping Cookie | 60 | |
| npc1729 | Euler's Totient | 20 | |
| kzzm | XOR Properties | 15 | |
| securial150 | Gaussian Reduction | 50 | |
| mszypere | Bean Counter | 60 | |
| CyberHuntr | Monoprime | 30 | |
| Ghost25 | Modular Arithmetic 1 | 20 | |
| Kospatt | CTRIME | 70 | |
| Sakura_luo | Bytes and Big Integers | 10 | |
| Ablo | XOR Properties | 15 | |
| kushnerykpavlo | XOR Starter | 10 | |
| WarSpore | Honest Verifier Zero Knowledge | 30 | |
| DonAsako | Computing Public Values | 25 | |
| sujin | Merkle Trees | 25 | |
| mszypere | Symmetry | 50 | |
| kzzm | XOR Starter | 10 | |
| shadowguy | Manyprime | 40 | |
| fox_wolf7 | Quadratic Residues | 25 | |
| dusk0 | Bytes and Big Integers | 10 | |
| aloos | Favourite byte | 20 | |
| kushnerykpavlo | Bytes and Big Integers | 10 | |
| dusk0 | Base64 | 10 | |
| shadowguy | Square Eyes | 35 | |
| kzzm | Bytes and Big Integers | 10 | |
| shadowguy | Monoprime | 30 | |
| kushnerykpavlo | Base64 | 10 |
You are now level Current level