| Date | User | Challenge | Score |
| Fen_zike | XOR Starter | 10 | |
| Fen_zike | Bytes and Big Integers | 10 | |
| Coolsade | Base64 | 10 | |
| thrdfloor | Base64 | 10 | |
| Fen_zike | Base64 | 10 | |
| Fen_zike | Hex | 5 | |
| j3j | Modular Arithmetic 1 | 20 | |
| killua4564 | Jeff's LFSR | 150 | |
| xseris | Static Client 2 | 120 | |
| j3j | Extended GCD | 20 | |
| Coolsade | ASCII | 5 | |
| Fen_zike | ASCII | 5 | |
| xseris | Static Client | 100 | |
| xseris | Export-grade | 100 | |
| thrdfloor | ASCII | 5 | |
| xseris | Generators of Groups | 20 | |
| Sorrontis | Finding Flags | 2 | |
| xseris | Ellipse Curve Cryptography | 125 | |
| lemful | Greatest Common Divisor | 15 | |
| xseris | Montgomery Curves | 30 | |
| xseris | Image Point Arithmetic | 30 | |
| xseris | Where's the Supersingular Curve | 25 | |
| sanya338 | Modular Inverting | 25 | |
| sixsquareAI | Let's Decrypt Again | 175 | |
| xseris | The j-invariant | 20 | |
| Dhriti | Great Snakes | 3 | |
| M0hi5h18 | You either know, XOR you don't | 30 | |
| NPM1LESS | XOR Properties | 15 | |
| sanya338 | Modular Arithmetic 2 | 20 | |
| webhacker | Euler's Totient | 20 | |
| Honoured_One | Export-grade | 100 | |
| NPM1LESS | XOR Starter | 10 | |
| Dexterfreak | Modular Inverting | 25 | |
| Dessert | Exceptional Curves | 100 | |
| Grupo1MAplicada | Passwords as Keys | 50 | |
| hunnter | ECB Oracle | 60 | |
| Grupo1MAplicada | Modes of Operation Starter | 15 | |
| sixsquareAI | Vote for Pedro | 150 | |
| NPM1LESS | Bytes and Big Integers | 10 | |
| vnrluh | Lemur XOR | 40 | |
| Dexterfreak | Modular Arithmetic 2 | 20 | |
| NPM1LESS | Base64 | 10 | |
| yajog | Deriving Symmetric Keys | 40 | |
| Grupo1MAplicada | Bringing It All Together | 50 | |
| Grupo1MAplicada | Diffusion through Permutation | 30 | |
| Dhriti | Finding Flags | 2 | |
| Grupo1MAplicada | Confusion through Substitution | 25 | |
| yajog | Computing Shared Secrets | 30 | |
| NPM1LESS | Hex | 5 | |
| Grupo1MAplicada | Round Keys | 20 |
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