| Date | User | Challenge | Score |
| schaft | Base64 | 10 | |
| xxxsimonxxx | Diffusion through Permutation | 30 | |
| schaft | Hex | 5 | |
| schaft | ASCII | 5 | |
| haeriphos | Quadratic Residues | 25 | |
| schaft | Great Snakes | 3 | |
| xxxsimonxxx | Confusion through Substitution | 25 | |
| xxxsimonxxx | Round Keys | 20 | |
| schaft | Finding Flags | 2 | |
| Anti_ | Diffusion through Permutation | 30 | |
| talidam | Bytes and Big Integers | 10 | |
| xxxsimonxxx | Structure of AES | 15 | |
| xxxsimonxxx | Resisting Bruteforce | 10 | |
| xxxsimonxxx | Keyed Permutations | 5 | |
| FuFon | Great Snakes | 3 | |
| SomeHybrid | Modular Square Root | 35 | |
| quangntenemy | Too Many Errors | 100 | |
| Emma2266 | Legendre Symbol | 35 | |
| FuFon | Finding Flags | 2 | |
| sokpheng001 | Bytes and Big Integers | 10 | |
| nous | Gram Schmidt | 30 | |
| sjvvvv | Confusion through Substitution | 25 | |
| Emma2266 | Quadratic Residues | 25 | |
| daembt | Bytes and Big Integers | 10 | |
| NMH_Asin | Key Backup Service 2 (HKCERT CTF) | 0 | |
| Emma2266 | Modular Inverting | 25 | |
| lizsikuku | Favourite byte | 20 | |
| talidam | Base64 | 10 | |
| lizsikuku | XOR Properties | 15 | |
| inv | Backpack Cryptography | 120 | |
| NMH_Asin | Signature (TSJ CTF) | 0 | |
| NMH_Asin | Tenet: The Plagarism (HKCERT CTF) | 0 | |
| NMH_Asin | Unevaluated (TETCTF) | 0 | |
| talidam | Hex | 5 | |
| NMH_Asin | Unimplemented (TETCTF) | 0 | |
| astolica | You either know, XOR you don't | 30 | |
| talidam | ASCII | 5 | |
| auliyahasanah | Network Attacks | 5 | |
| haeriphos | Modular Inverting | 25 | |
| lizsikuku | XOR Starter | 10 | |
| auliyahasanah | Great Snakes | 3 | |
| talidam | Great Snakes | 3 | |
| auliyahasanah | Finding Flags | 2 | |
| Grupo2_MateApli | Modes of Operation Starter | 15 | |
| auliyahasanah | ASCII | 5 | |
| lizsikuku | Bytes and Big Integers | 10 | |
| auliyahasanah | Hex | 5 | |
| Grupo2_MateApli | Resisting Bruteforce | 10 | |
| Op4l_ | Modular Arithmetic 1 | 20 | |
| Grupo2_MateApli | Keyed Permutations | 5 |
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