| Date | User | Challenge | Score |
| arkanos_phert | Hex | 5 | |
| mimiagina3959 | Modes of Operation Starter | 15 | |
| Osy | Modular Arithmetic 1 | 20 | |
| mimiagina3959 | Bringing It All Together | 50 | |
| Kacper_PW | No Way Back Home | 100 | |
| ssk0yy01_ | Diffusion through Permutation | 30 | |
| mimiagina3959 | Diffusion through Permutation | 30 | |
| mimiagina3959 | Confusion through Substitution | 25 | |
| Dominik_KRYS_Lab | Broken RSA | 100 | |
| Mr_Sir | Bytes and Big Integers | 10 | |
| mimiagina3959 | Round Keys | 20 | |
| mimiagina3959 | Structure of AES | 15 | |
| mimiagina3959 | Resisting Bruteforce | 10 | |
| mimiagina3959 | Keyed Permutations | 5 | |
| Osy | Extended GCD | 20 | |
| Adam01178650 | Broken RSA | 100 | |
| YoYoRap | Bytes and Big Integers | 10 | |
| YoYoRap | Base64 | 10 | |
| sunny_0 | Hex | 5 | |
| YoYoRap | Hex | 5 | |
| Osy | Greatest Common Divisor | 15 | |
| sunny_0 | ASCII | 5 | |
| TalionVS | No Way JOSE | 20 | |
| Dominik_KRYS_Lab | Unencryptable | 125 | |
| YoYoRap | ASCII | 5 | |
| sunny_0 | Great Snakes | 3 | |
| N_Josiah | Bean Counter | 60 | |
| YoYoRap | Great Snakes | 3 | |
| Kacper_PW | Broken RSA | 100 | |
| YoYoRap | Finding Flags | 2 | |
| N_Josiah | Symmetry | 50 | |
| cavazinf | Noise Cheap | 90 | |
| FelixAchachi | You either know, XOR you don't | 30 | |
| FelixAchachi | Favourite byte | 20 | |
| s0uls | XOR Starter | 10 | |
| FelixAchachi | XOR Properties | 15 | |
| FelixAchachi | XOR Starter | 10 | |
| iamshazzyy | Modes of Operation Starter | 15 | |
| sunny_0 | Finding Flags | 2 | |
| FelixAchachi | Bytes and Big Integers | 10 | |
| FelixAchachi | Base64 | 10 | |
| Dinosaurik | Base64 | 10 | |
| Mr_Sir | Base64 | 10 | |
| FelixAchachi | Hex | 5 | |
| tank1st | You either know, XOR you don't | 30 | |
| FelixAchachi | ASCII | 5 | |
| FelixAchachi | Great Snakes | 3 | |
| FelixAchachi | Finding Flags | 2 | |
| Dinosaurik | Hex | 5 | |
| Dominik_KRYS_Lab | Roll your Own | 125 |
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