| Date | User | Challenge | Score |
| hjjjk78 | Modular Arithmetic 2 | 20 | |
| senynmaman | Transparency | 50 | |
| semey | Diffusion through Permutation | 30 | |
| Archi_K | You either know, XOR you don't | 30 | |
| senynmaman | SSH Keys | 35 | |
| senynmaman | CERTainly not | 30 | |
| semey | Confusion through Substitution | 25 | |
| Nadav160 | Confusion through Substitution | 25 | |
| hamoji04 | Hex | 5 | |
| semey | Round Keys | 20 | |
| ne0xx | XOR Starter | 10 | |
| senynmaman | Privacy-Enhanced Mail? | 25 | |
| semey | Structure of AES | 15 | |
| Ylitka | ASCII | 5 | |
| senynmaman | Modular Inverting | 25 | |
| senynmaman | Modular Arithmetic 2 | 20 | |
| senynmaman | Modular Arithmetic 1 | 20 | |
| senynmaman | Extended GCD | 20 | |
| semey | Resisting Bruteforce | 10 | |
| ne0xx | Bytes and Big Integers | 10 | |
| semey | Keyed Permutations | 5 | |
| senynmaman | Greatest Common Divisor | 15 | |
| senynmaman | Lemur XOR | 40 | |
| semey | Transparency | 50 | |
| Eiriew | XOR Properties | 15 | |
| ne0xx | Base64 | 10 | |
| sheina906 | Symmetry | 50 | |
| shraddha_t | Bytes and Big Integers | 10 | |
| Ylitka | Great Snakes | 3 | |
| AlkisTheCipher | Broken RSA | 100 | |
| Panos_p23236 | Salty | 20 | |
| dXNlcm5hbWU_ | Factoring | 15 | |
| senynmaman | You either know, XOR you don't | 30 | |
| senynmaman | Favourite byte | 20 | |
| semey | SSH Keys | 35 | |
| senynmaman | Encoding Challenge | 40 | |
| Ylitka | Finding Flags | 2 | |
| semey | CERTainly not | 30 | |
| senynmaman | XOR Properties | 15 | |
| TheRealMiKi | You either know, XOR you don't | 30 | |
| ne0xx | Hex | 5 | |
| hamoji04 | ASCII | 5 | |
| semey | Privacy-Enhanced Mail? | 25 | |
| senynmaman | XOR Starter | 10 | |
| shraddha_t | Base64 | 10 | |
| Lemon28 | Keyed Permutations | 5 | |
| siapaHeker | Resisting Bruteforce | 10 | |
| Archi_K | Favourite byte | 20 | |
| S4NTI | You either know, XOR you don't | 30 | |
| semey | Modular Inverting | 25 |
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