| Date | User | Challenge | Score |
| Amro_Hussein | Generators of Groups | 20 | |
| yowsevanz | ASCII | 5 | |
| alice77 | You either know, XOR you don't | 30 | |
| PPotat0 | XOR Properties | 15 | |
| yowsevanz | Great Snakes | 3 | |
| yowsevanz | Finding Flags | 2 | |
| zzazzraazz | XOR Starter | 10 | |
| Meenu | Base64 | 10 | |
| zzazzraazz | Bytes and Big Integers | 10 | |
| Amro_Hussein | Working with Fields | 10 | |
| Zira | Modes of Operation Starter | 15 | |
| kevin21 | Confusion through Substitution | 25 | |
| morthalx | Great Snakes | 3 | |
| morthalx | Finding Flags | 2 | |
| zzazzraazz | Base64 | 10 | |
| Meenu | Hex | 5 | |
| cavazinf | Let's Decrypt Again | 175 | |
| Adrinn | Bringing It All Together | 50 | |
| 0_0A | Quadratic Residues | 25 | |
| zzazzraazz | Hex | 5 | |
| Meenu | ASCII | 5 | |
| zzazzraazz | ASCII | 5 | |
| zzazzraazz | Great Snakes | 3 | |
| zzazzraazz | Finding Flags | 2 | |
| Meenu | Great Snakes | 3 | |
| kevin21 | Round Keys | 20 | |
| youssefKhaled | ASCII | 5 | |
| cavazinf | Vote for Pedro | 150 | |
| cavazinf | Blinding Light | 120 | |
| cavazinf | Let's Decrypt | 80 | |
| youssefKhaled | Great Snakes | 3 | |
| youssefKhaled | Finding Flags | 2 | |
| byxlopoqpul | Diffusion through Permutation | 30 | |
| cavazinf | Signing Server | 60 | |
| cryptohack137 | Legendre Symbol | 35 | |
| agentjlrmt | The Matrix Reloaded | 100 | |
| THz | Manyprime | 40 | |
| selectride | Backpack Cryptography | 120 | |
| saro | Let's Prove It | 120 | |
| apollyon05 | Modular Inverting | 25 | |
| Devishere | Finding Flags | 2 | |
| THz | Square Eyes | 35 | |
| bachthaison1 | Modular Square Root | 35 | |
| Hari542 | Monoprime | 30 | |
| cavazinf | Null or Never | 100 | |
| Wequra | Efficient Exchange | 50 | |
| apollyon05 | Modular Arithmetic 2 | 20 | |
| bachthaison1 | Legendre Symbol | 35 | |
| byxlopoqpul | Confusion through Substitution | 25 | |
| Vinjr | Exceptional Curves | 100 |
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