| Date | User | Challenge | Score |
| Ar_Dandan | Bytes and Big Integers | 10 | |
| zgd909 | Jack's Birthday Confusion | 30 | |
| zgd909 | Jack's Birthday Hash | 20 | |
| Artur6725 | Symmetry | 50 | |
| zgd909 | Unencryptable | 125 | |
| kostasskor | Hex | 5 | |
| zgd909 | Roll your Own | 125 | |
| zgd909 | Ellipse Curve Cryptography | 125 | |
| Klaudia | Resisting Bruteforce | 10 | |
| zgd909 | No Way Back Home | 100 | |
| frejfoe | Jack's Birthday Confusion | 30 | |
| zgd909 | Broken RSA | 100 | |
| zgd909 | Modular Binomials | 80 | |
| sewulas | Additive | 70 | |
| seagul | Favourite byte | 20 | |
| zgd909 | Adrien's Signs | 80 | |
| zgd909 | Successive Powers | 60 | |
| zgd909 | Chinese Remainder Theorem | 40 | |
| zgd909 | Modular Square Root | 35 | |
| TnT_DG | Private Keys | 20 | |
| kkimyy | Great Snakes | 3 | |
| AHMADLABOLABO | Efficient Exchange | 50 | |
| seagul | XOR Properties | 15 | |
| MJD_YAM | Finding Flags | 2 | |
| zgd909 | Legendre Symbol | 35 | |
| MJD_YAM | Network Attacks | 5 | |
| zgd909 | Quadratic Residues | 25 | |
| GemlinF | Finding Flags | 2 | |
| Klaudia | Keyed Permutations | 5 | |
| Ar_Dandan | Base64 | 10 | |
| zgd909 | CERTainly not | 30 | |
| zgd909 | Privacy-Enhanced Mail? | 25 | |
| zgd909 | Modular Inverting | 25 | |
| zgd909 | Modular Arithmetic 2 | 20 | |
| zgd909 | Modular Arithmetic 1 | 20 | |
| doneyit413 | Paper Plane | 120 | |
| zgd909 | Extended GCD | 20 | |
| zgd909 | Greatest Common Divisor | 15 | |
| zgd909 | Lemur XOR | 40 | |
| seagul | XOR Starter | 10 | |
| zgd909 | You either know, XOR you don't | 30 | |
| johnleinartiv_gm | Finding Flags | 2 | |
| zgd909 | Favourite byte | 20 | |
| zgd909 | XOR Properties | 15 | |
| zgd909 | XOR Starter | 10 | |
| seagul | Bytes and Big Integers | 10 | |
| zgd909 | Encoding Challenge | 40 | |
| frejfoe | Jack's Birthday Hash | 20 | |
| zgd909 | Bytes and Big Integers | 10 | |
| zgd909 | Base64 | 10 |
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