| Date | User | Challenge | Score |
| bornTOhack | Extended GCD | 20 | |
| Andyqian7 | SSH Keys | 35 | |
| clement0x1024 | Confusion through Substitution | 25 | |
| Huaijiu | Bytes and Big Integers | 10 | |
| ChipKid | Jack's Birthday Confusion | 30 | |
| pualo00 | ASCII | 5 | |
| Lastno | ASCII | 5 | |
| fenrosys | Real Eisenstein | 150 | |
| Huaijiu | Base64 | 10 | |
| Shinerone | Diffusion through Permutation | 30 | |
| Spring | Hex | 5 | |
| Lastno | Great Snakes | 3 | |
| Lastno | Finding Flags | 2 | |
| fenrosys | Unencryptable | 125 | |
| NoBirdWasHam | SSH Keys | 35 | |
| NoBirdWasHam | CERTainly not | 30 | |
| NoBirdWasHam | Privacy-Enhanced Mail? | 25 | |
| NoBirdWasHam | Modular Inverting | 25 | |
| NoBirdWasHam | Modular Arithmetic 2 | 20 | |
| NoBirdWasHam | Modular Arithmetic 1 | 20 | |
| NoBirdWasHam | Extended GCD | 20 | |
| NoBirdWasHam | Greatest Common Divisor | 15 | |
| ms13_96 | Confusion through Substitution | 25 | |
| Huaijiu | Hex | 5 | |
| fenrosys | Ellipse Curve Cryptography | 125 | |
| nixu_chiller | Jack's Birthday Hash | 20 | |
| fenrosys | No Way Back Home | 100 | |
| RoninKJ | Common Ground | 75 | |
| Andyqian7 | CERTainly not | 30 | |
| Andyqian7 | Privacy-Enhanced Mail? | 25 | |
| Spring | Great Snakes | 3 | |
| roogs22 | Manyprime | 40 | |
| ms13_96 | Round Keys | 20 | |
| Andyqian7 | Modular Inverting | 25 | |
| Andyqian7 | Modular Arithmetic 2 | 20 | |
| Andyqian7 | Modular Arithmetic 1 | 20 | |
| Andyqian7 | Extended GCD | 20 | |
| Spring | Finding Flags | 2 | |
| Andyqian7 | Greatest Common Divisor | 15 | |
| roogs22 | Square Eyes | 35 | |
| Kasongo190013 | Export-grade | 100 | |
| Andyqian7 | Lemur XOR | 40 | |
| phomai739391 | LWE High Bits Message | 15 | |
| Spring | ASCII | 5 | |
| Kasongo190013 | Parameter Injection | 60 | |
| Huaijiu | ASCII | 5 | |
| Allumette | ECB Oracle | 60 | |
| Huaijiu | Great Snakes | 3 | |
| pualo00 | Great Snakes | 3 | |
| Kasongo190013 | Deriving Symmetric Keys | 40 |
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