| Date | User | Challenge | Score |
| gabo | Network Attacks | 5 | |
| gabo | XOR Starter | 10 | |
| gabo | Bytes and Big Integers | 10 | |
| gabo | Base64 | 10 | |
| TyLion | Parameter Injection | 60 | |
| richmoneybank479 | Modes of Operation Starter | 15 | |
| gabo | Hex | 5 | |
| zsnafu | Modes of Operation Starter | 15 | |
| gabo | ASCII | 5 | |
| Revi | You either know, XOR you don't | 30 | |
| gabo | Great Snakes | 3 | |
| omena | ASCII | 5 | |
| Revi | Favourite byte | 20 | |
| Revi | XOR Properties | 15 | |
| RuslanPaputsia | Diffusion through Permutation | 30 | |
| gabo | Finding Flags | 2 | |
| RuslanPaputsia | Confusion through Substitution | 25 | |
| RuslanPaputsia | Round Keys | 20 | |
| RuslanPaputsia | Structure of AES | 15 | |
| bl4ck4rch | Finding Flags | 2 | |
| Revi | XOR Starter | 10 | |
| RuslanPaputsia | Resisting Bruteforce | 10 | |
| RuslanPaputsia | Keyed Permutations | 5 | |
| Revi | Bytes and Big Integers | 10 | |
| Revi | Base64 | 10 | |
| Revi | Hex | 5 | |
| Revi | ASCII | 5 | |
| gellyfisher | Forbidden Fruit | 150 | |
| Revi | Great Snakes | 3 | |
| omena | Great Snakes | 3 | |
| Revi | Finding Flags | 2 | |
| Bat_bjj | Greatest Common Divisor | 15 | |
| zsnafu | Bringing It All Together | 50 | |
| MarkAnton00 | Greatest Common Divisor | 15 | |
| totor21 | Modular Square Root | 35 | |
| totor21 | Legendre Symbol | 35 | |
| Aman27 | Finding Flags | 2 | |
| ALKMORPH | RSA Decryption | 20 | |
| Aman27 | Great Snakes | 3 | |
| ALKMORPH | Private Keys | 20 | |
| nwal | Smooth Criminal | 60 | |
| ALKMORPH | Euler's Totient | 20 | |
| ALKMORPH | Public Keys | 15 | |
| SuperChrisps | Chinese Remainder Theorem | 40 | |
| MarkAnton00 | You either know, XOR you don't | 30 | |
| feisiyang | Quadratic Residues | 25 | |
| ALKMORPH | Modular Exponentiation | 10 | |
| feisiyang | Modular Inverting | 25 | |
| feisiyang | Modular Arithmetic 2 | 20 | |
| feisiyang | Modular Arithmetic 1 | 20 |
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