| Date | User | Challenge | Score |
| Valcia | XOR Properties | 15 | |
| fetiddius | Greatest Common Divisor | 15 | |
| lylythechosenone | Modular Inverting | 25 | |
| fetiddius | You either know, XOR you don't | 30 | |
| lylythechosenone | Modular Arithmetic 2 | 20 | |
| Valcia | XOR Starter | 10 | |
| EmmanuelGoldberg | Twin Keys | 100 | |
| M0xX | ECB CBC WTF | 55 | |
| alexcabebe | Bytes and Big Integers | 10 | |
| alexcabebe | Base64 | 10 | |
| Grupo9_Mate | Network Attacks | 5 | |
| sneaker7 | Base64 | 10 | |
| Grupo9_Mate | Great Snakes | 3 | |
| alexcabebe | Hex | 5 | |
| Grupo9_Mate | Finding Flags | 2 | |
| alexcabebe | ASCII | 5 | |
| sneaker7 | Hex | 5 | |
| Grupo10MA | XOR Starter | 10 | |
| fetiddius | Favourite byte | 20 | |
| Melek | Quadratic Residues | 25 | |
| Valcia | Bytes and Big Integers | 10 | |
| ludde | Finding Flags | 2 | |
| waterMelonakdsfk | ECB Oracle | 60 | |
| sneaker7 | ASCII | 5 | |
| fetiddius | XOR Properties | 15 | |
| Melek | Network Attacks | 5 | |
| Melek | Modular Inverting | 25 | |
| Valcia | Base64 | 10 | |
| ulfbrand | Finding Flags | 2 | |
| Melek | Modular Arithmetic 2 | 20 | |
| lylythechosenone | Extended GCD | 20 | |
| mortac | WOTS Up 2 | 90 | |
| JIoVeTS | Quadratic Residues | 25 | |
| mariannaf | Quadratic Residues | 25 | |
| JIoVeTS | Modular Inverting | 25 | |
| salut | You either know, XOR you don't | 30 | |
| JIoVeTS | Modular Arithmetic 2 | 20 | |
| sneaker7 | Great Snakes | 3 | |
| JIoVeTS | Modular Arithmetic 1 | 20 | |
| JIoVeTS | Extended GCD | 20 | |
| KoiJ | Great Snakes | 3 | |
| Comsec | Round Keys | 20 | |
| JIoVeTS | Greatest Common Divisor | 15 | |
| sneaker7 | Finding Flags | 2 | |
| Madim | Passwords as Keys | 50 | |
| JIoVeTS | You either know, XOR you don't | 30 | |
| KoiJ | Finding Flags | 2 | |
| NicoO | Structure of AES | 15 | |
| Madim | Modes of Operation Starter | 15 | |
| Madim | Bringing It All Together | 50 |
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