| Date | User | Challenge | Score |
| weisse | Finding Flags | 2 | |
| junyouzin4209 | Cipher Mode Picker (HKCERT CTF) | 0 | |
| Iris1705 | Hex | 5 | |
| Iris1705 | ASCII | 5 | |
| Iris1705 | Network Attacks | 5 | |
| parkdongjin | Quadratic Residues | 25 | |
| parkdongjin | Modular Inverting | 25 | |
| parkdongjin | Modular Arithmetic 2 | 20 | |
| parkdongjin | Modular Arithmetic 1 | 20 | |
| 1Lovef0xy | Diffusion through Permutation | 30 | |
| gxtigra | XOR Starter | 10 | |
| parkdongjin | Extended GCD | 20 | |
| parkdongjin | Greatest Common Divisor | 15 | |
| Ah_Crypto2 | Export-grade | 100 | |
| parkdongjin | You either know, XOR you don't | 30 | |
| parkdongjin | Favourite byte | 20 | |
| parkdongjin | XOR Properties | 15 | |
| 1Lovef0xy | Confusion through Substitution | 25 | |
| meowgirl_0 | Bytes and Big Integers | 10 | |
| parkdongjin | XOR Starter | 10 | |
| parkdongjin | Bytes and Big Integers | 10 | |
| parkdongjin | Base64 | 10 | |
| parkdongjin | Hex | 5 | |
| kaisu980 | You either know, XOR you don't | 30 | |
| parkdongjin | ASCII | 5 | |
| gxtigra | Bytes and Big Integers | 10 | |
| parkdongjin | Great Snakes | 3 | |
| 1Lovef0xy | Round Keys | 20 | |
| parkdongjin | Finding Flags | 2 | |
| kaisu980 | Favourite byte | 20 | |
| testoto55 | You either know, XOR you don't | 30 | |
| kaisu980 | XOR Properties | 15 | |
| hakka52 | Parameter Injection | 60 | |
| testoto55 | Favourite byte | 20 | |
| hakka52 | Export-grade | 100 | |
| testoto55 | XOR Properties | 15 | |
| lumpy | You either know, XOR you don't | 30 | |
| 0xftp | Euler's Totient | 20 | |
| Cedric_44 | ASCII | 5 | |
| lumpy | Favourite byte | 20 | |
| testoto55 | XOR Starter | 10 | |
| Cedric_44 | Great Snakes | 3 | |
| testoto55 | Bytes and Big Integers | 10 | |
| lumpy | XOR Properties | 15 | |
| 0xftp | Public Keys | 15 | |
| PizzaGuy408 | Modular Arithmetic 1 | 20 | |
| PizzaGuy408 | Extended GCD | 20 | |
| PizzaGuy408 | Greatest Common Divisor | 15 | |
| testoto55 | Base64 | 10 | |
| PizzaGuy408 | Lemur XOR | 40 |
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