| Date | User | Challenge | Score |
| Klaudia | Gaussian Reduction | 50 | |
| c0mpos3r99 | Base64 | 10 | |
| yoni_naamat | Static Client | 100 | |
| aleena_meraj | Confusion through Substitution | 25 | |
| aleena_meraj | Round Keys | 20 | |
| Roman1301 | Hex | 5 | |
| ali_hamas | ECB Oracle | 60 | |
| rokhayaa88 | Modular Arithmetic 1 | 20 | |
| ali_hamas | Passwords as Keys | 50 | |
| aleena_meraj | Structure of AES | 15 | |
| ali_hamas | Modes of Operation Starter | 15 | |
| ali_hamas | Bringing It All Together | 50 | |
| ali_hamas | Diffusion through Permutation | 30 | |
| ali_hamas | Confusion through Substitution | 25 | |
| ali_hamas | Round Keys | 20 | |
| c0mpos3r99 | Hex | 5 | |
| Klaudia | What's a Lattice? | 40 | |
| Shlomi | Adrien's Signs | 80 | |
| ali_hamas | Lemur XOR | 40 | |
| yoni_naamat | Export-grade | 100 | |
| ali_hamas | Export-grade | 100 | |
| ali_hamas | Parameter Injection | 60 | |
| rokhayaa88 | Extended GCD | 20 | |
| ali_hamas | Deriving Symmetric Keys | 40 | |
| Shlomi | Chinese Remainder Theorem | 40 | |
| ali_hamas | Computing Shared Secrets | 30 | |
| Katarn | Finding Flags | 2 | |
| ubercustomer1337 | Triple DES | 60 | |
| maxsu | Encoding Challenge | 40 | |
| rokhayaa88 | Greatest Common Divisor | 15 | |
| Tsukishima_shiji | Moving Problems | 150 | |
| ali_hamas | Computing Public Values | 25 | |
| rokhayaa88 | You either know, XOR you don't | 30 | |
| c0mpos3r99 | ASCII | 5 | |
| ali_hamas | Generators of Groups | 20 | |
| ali_hamas | Working with Fields | 10 | |
| NikOverflow | Resisting Bruteforce | 10 | |
| NikOverflow | Keyed Permutations | 5 | |
| cyef45 | XOR Starter | 10 | |
| NikOverflow | XOR Starter | 10 | |
| NikOverflow | Encoding Challenge | 40 | |
| Lgoral | Saying Hello | 20 | |
| hunnter | Keyed Permutations | 5 | |
| NikOverflow | Bytes and Big Integers | 10 | |
| Lgoral | TLS Handshake | 15 | |
| NikOverflow | Base64 | 10 | |
| Green_hat | Base64 | 10 | |
| fourth_love | Base64 | 10 | |
| NikOverflow | Hex | 5 | |
| NikOverflow | ASCII | 5 |
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