| Date | User | Challenge | Score |
| rznanss61 | You either know, XOR you don't | 30 | |
| seozhank | Base64 | 10 | |
| Sravan16 | XOR Starter | 10 | |
| mmayabi | Modular Binomials | 80 | |
| kraksenz | You either know, XOR you don't | 30 | |
| VxRabbit | Modes of Operation Starter | 15 | |
| Auvren | Great Snakes | 3 | |
| kokosoko59 | Modular Square Root | 35 | |
| bhupen07_ | Resisting Bruteforce | 10 | |
| MK_ZG | Lemur XOR | 40 | |
| seozhank | Hex | 5 | |
| Sam001 | Efficient Exchange | 50 | |
| Sam001 | Curves and Logs | 40 | |
| Sravan16 | Bytes and Big Integers | 10 | |
| Sam001 | Scalar Multiplication | 35 | |
| bhupen07_ | Keyed Permutations | 5 | |
| Sam001 | Point Addition | 30 | |
| Sam001 | Point Negation | 10 | |
| Sam001 | Background Reading | 5 | |
| Auvren | Finding Flags | 2 | |
| rznanss61 | Favourite byte | 20 | |
| VxRabbit | Bringing It All Together | 50 | |
| MK_ZG | Network Attacks | 5 | |
| kraksenz | Favourite byte | 20 | |
| CutRaNgoai | Hex | 5 | |
| xiongp | Modular Binomials | 80 | |
| xiongp | Adrien's Signs | 80 | |
| xiongp | Chinese Remainder Theorem | 40 | |
| avd9 | ECB CBC WTF | 55 | |
| xiongp | Modular Square Root | 35 | |
| LStndaze | Finding Flags | 2 | |
| Krytchs | XOR Starter | 10 | |
| xiongp | Legendre Symbol | 35 | |
| xiongp | Quadratic Residues | 25 | |
| xiongp | Modular Inverting | 25 | |
| xiongp | Modular Arithmetic 2 | 20 | |
| eLjok3r | Finding Flags | 2 | |
| xiongp | Modular Arithmetic 1 | 20 | |
| bhupen07_ | Network Attacks | 5 | |
| xiongp | Extended GCD | 20 | |
| rznanss61 | XOR Properties | 15 | |
| xiongp | Greatest Common Divisor | 15 | |
| paxel | Confusion through Substitution | 25 | |
| artem_1 | Pad Thai | 80 | |
| vulnx404 | XOR Starter | 10 | |
| Assem64 | You either know, XOR you don't | 30 | |
| CrankyPants | Transparency | 50 | |
| jageesh | Extended GCD | 20 | |
| avd9 | Passwords as Keys | 50 | |
| Krisna | XOR Starter | 10 |
You are now level Current level