| Date | User | Challenge | Score |
| parkjaemin | Bean Counter | 60 | |
| 048224 | ECB CBC WTF | 55 | |
| parkjaemin | Symmetry | 50 | |
| chrisfox | Greatest Common Divisor | 15 | |
| Nunya777 | Keyed Permutations | 5 | |
| Laniakea24 | ECB CBC WTF | 55 | |
| caspeer | XOR Starter | 10 | |
| Nunya777 | Modular Binomials | 80 | |
| Nunya777 | Adrien's Signs | 80 | |
| Nunya777 | Chinese Remainder Theorem | 40 | |
| Nunya777 | Modular Square Root | 35 | |
| ungjae | Modes of Operation Starter | 15 | |
| hallabarhoumeh | Dancing Queen | 120 | |
| hallabarhoumeh | Stream of Consciousness | 80 | |
| hallabarhoumeh | Logon Zero | 80 | |
| hallabarhoumeh | CTRIME | 70 | |
| caspeer | Bytes and Big Integers | 10 | |
| hallabarhoumeh | Bean Counter | 60 | |
| hallabarhoumeh | Symmetry | 50 | |
| hallabarhoumeh | Triple DES | 60 | |
| hallabarhoumeh | Lazy CBC | 60 | |
| hallabarhoumeh | Flipping Cookie | 60 | |
| hallabarhoumeh | ECB Oracle | 60 | |
| Enki | Great Snakes | 3 | |
| Enki | Finding Flags | 2 | |
| hallabarhoumeh | ECB CBC WTF | 55 | |
| hallabarhoumeh | Passwords as Keys | 50 | |
| hallabarhoumeh | Modes of Operation Starter | 15 | |
| Alee | Moving Problems | 150 | |
| hallabarhoumeh | Bringing It All Together | 50 | |
| hallabarhoumeh | Diffusion through Permutation | 30 | |
| pypykatz | Round Keys | 20 | |
| hallabarhoumeh | Confusion through Substitution | 25 | |
| hallabarhoumeh | Round Keys | 20 | |
| hallabarhoumeh | Structure of AES | 15 | |
| hallabarhoumeh | Resisting Bruteforce | 10 | |
| hallabarhoumeh | Keyed Permutations | 5 | |
| hallabarhoumeh | Transparency | 50 | |
| hallabarhoumeh | SSH Keys | 35 | |
| hallabarhoumeh | CERTainly not | 30 | |
| Nunya777 | Legendre Symbol | 35 | |
| ungjae | Bringing It All Together | 50 | |
| Dropflux | XOR Starter | 10 | |
| hallabarhoumeh | Privacy-Enhanced Mail? | 25 | |
| ___d_z___ | Bytes and Big Integers | 10 | |
| Dropflux | Bytes and Big Integers | 10 | |
| caspeer | Base64 | 10 | |
| caspeer | Hex | 5 | |
| hallabarhoumeh | Modular Inverting | 25 | |
| hallabarhoumeh | Modular Arithmetic 2 | 20 |
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