| Date | User | Challenge | Score |
| JoanMakena | Quadratic Residues | 25 | |
| JoanMakena | Modular Inverting | 25 | |
| JoanMakena | Modular Arithmetic 2 | 20 | |
| mailmail | Finding Flags | 2 | |
| JoanMakena | Modular Arithmetic 1 | 20 | |
| NidhiAryal | ASCII | 5 | |
| JoanMakena | Extended GCD | 20 | |
| JoanMakena | Greatest Common Divisor | 15 | |
| hyewonjeong | You either know, XOR you don't | 30 | |
| NidhiAryal | Great Snakes | 3 | |
| xMoiuz | Logon Zero | 80 | |
| 1_Kiron_1 | ASCII | 5 | |
| NidhiAryal | Finding Flags | 2 | |
| xMoiuz | CTRIME | 70 | |
| Emtor42 | Diffusion through Permutation | 30 | |
| bigredduck | Bytes and Big Integers | 10 | |
| hyewonjeong | Favourite byte | 20 | |
| AndrewS | Hex | 5 | |
| bigredduck | Base64 | 10 | |
| bigredduck | Hex | 5 | |
| hyewonjeong | XOR Properties | 15 | |
| bigredduck | ASCII | 5 | |
| bigredduck | Great Snakes | 3 | |
| AndrewS | ASCII | 5 | |
| bigredduck | Finding Flags | 2 | |
| Aghil | Quadratic Residues | 25 | |
| Matthewng503 | Factoring | 15 | |
| xMoiuz | Triple DES | 60 | |
| 2134dsa | XOR Starter | 10 | |
| xMoiuz | Lazy CBC | 60 | |
| Aghil | Modular Inverting | 25 | |
| hyewonjeong | XOR Starter | 10 | |
| Aghil | Modular Arithmetic 2 | 20 | |
| 2134dsa | Bytes and Big Integers | 10 | |
| xMoiuz | Transparency | 50 | |
| Roshini2719 | Finding Flags | 2 | |
| Aghil | Modular Arithmetic 1 | 20 | |
| kurumi_ | Pad Thai | 80 | |
| xMoiuz | SSH Keys | 35 | |
| HumanHumanName | Modular Arithmetic 1 | 20 | |
| 2134dsa | Base64 | 10 | |
| skkeem | ECB Oracle | 60 | |
| xMoiuz | CERTainly not | 30 | |
| hellooooowww | Infinite Descent | 50 | |
| hellooooowww | Marin's Secrets | 50 | |
| xMoiuz | Privacy-Enhanced Mail? | 25 | |
| hellooooowww | Fast Primes | 75 | |
| hellooooowww | Ron was Wrong, Whit is Right | 90 | |
| hellooooowww | Bespoke Padding | 100 | |
| hellooooowww | Null or Never | 100 |
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