| Date | User | Challenge | Score |
| Chetalam | ASCII | 5 | |
| Iris1705 | Confusion through Substitution | 25 | |
| Chetalam | Great Snakes | 3 | |
| jaehyeon | Favourite byte | 20 | |
| sanzx | Great Snakes | 3 | |
| DaoHui | ASCII | 5 | |
| sanzx | Finding Flags | 2 | |
| jaehyeon | XOR Properties | 15 | |
| Ikamar | Finding Flags | 2 | |
| DaoHui | Great Snakes | 3 | |
| jaehyeon | XOR Starter | 10 | |
| DaoHui | Finding Flags | 2 | |
| jaehyeon | Bytes and Big Integers | 10 | |
| phongtin27 | XOR Starter | 10 | |
| Iris1705 | Round Keys | 20 | |
| cryto_king | XOR Properties | 15 | |
| jaehyeon | Base64 | 10 | |
| Namunamu | Find the Lattice | 100 | |
| ToiSoCode | Computing Shared Secrets | 30 | |
| jaehyeon | Hex | 5 | |
| jablonskim | No Way Back Home | 100 | |
| jaehyeon | ASCII | 5 | |
| jaehyeon | Great Snakes | 3 | |
| jaehyeon | Finding Flags | 2 | |
| DangKhoaVox | Chinese Remainder Theorem | 40 | |
| Iris1705 | Structure of AES | 15 | |
| sgrenz | The Good, The Pad, The Ugly | 100 | |
| Tudoratorul | ASCII | 5 | |
| danaaaa24 | Bytes and Big Integers | 10 | |
| DangKhoaVox | Modular Square Root | 35 | |
| Tudoratorul | Great Snakes | 3 | |
| Tudoratorul | Finding Flags | 2 | |
| DangKhoaVox | Legendre Symbol | 35 | |
| junyouzin4209 | Unevaluated (TETCTF) | 0 | |
| Iris1705 | Resisting Bruteforce | 10 | |
| vivisect0r | Diffusion through Permutation | 30 | |
| deniszab | Bringing It All Together | 50 | |
| jglass | ECB CBC WTF | 55 | |
| jglass | ECB Oracle | 60 | |
| jglass | Passwords as Keys | 50 | |
| Iris1705 | Keyed Permutations | 5 | |
| jglass | Modes of Operation Starter | 15 | |
| tanxiaoyan | Private Keys | 20 | |
| jglass | Bringing It All Together | 50 | |
| hashcrack | Bytes and Big Integers | 10 | |
| ToiSoCode | Computing Public Values | 25 | |
| jglass | Diffusion through Permutation | 30 | |
| bl4nkyy | Greatest Common Divisor | 15 | |
| jglass | Confusion through Substitution | 25 | |
| tanxiaoyan | RSA Decryption | 20 |
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