| Date | User | Challenge | Score |
| hata | Hash Stuffing | 50 | |
| asd123 | Confusion through Substitution | 25 | |
| Abhi989 | Structure of AES | 15 | |
| mcarrow | XOR Starter | 10 | |
| Kran | Modulus Inutilis | 50 | |
| Piotr3121 | You either know, XOR you don't | 30 | |
| sydneyaisha | Modular Arithmetic 1 | 20 | |
| Kran | Salty | 20 | |
| ParkJuHeon | Base64 | 10 | |
| asd123 | Round Keys | 20 | |
| Desdous | Extended GCD | 20 | |
| L_0082 | Finding Flags | 2 | |
| JackDaz | Finding Flags | 2 | |
| asd123 | Structure of AES | 15 | |
| JLegend767 | Hex | 5 | |
| hack_use_math | Signing Server | 60 | |
| Ishant | Modular Inverting | 25 | |
| forge | Finding Flags | 2 | |
| mcarrow | Bytes and Big Integers | 10 | |
| JLegend767 | ASCII | 5 | |
| zjh | Modular Arithmetic 1 | 20 | |
| JLegend767 | Great Snakes | 3 | |
| kamlllzx | Greatest Common Divisor | 15 | |
| starnotes | Vectors | 10 | |
| chewinonthecable | Modular Inverting | 25 | |
| Franczesko | Base64 | 10 | |
| Abhi989 | Resisting Bruteforce | 10 | |
| Franczesko | Hex | 5 | |
| Abhi989 | Keyed Permutations | 5 | |
| JLegend767 | Finding Flags | 2 | |
| zjh | Extended GCD | 20 | |
| Stellight | Base64 | 10 | |
| AhmadjAbuzarqa | Transparency | 50 | |
| Ishant | Modular Arithmetic 2 | 20 | |
| Franczesko | ASCII | 5 | |
| mcarrow | Base64 | 10 | |
| skilzz07 | Bytes and Big Integers | 10 | |
| mcarrow | Hex | 5 | |
| skilzz07 | Base64 | 10 | |
| keyxxxtop | You either know, XOR you don't | 30 | |
| Stellight | Hex | 5 | |
| mcarrow | ASCII | 5 | |
| AhmadjAbuzarqa | SSH Keys | 35 | |
| mcarrow | Great Snakes | 3 | |
| asd123 | Resisting Bruteforce | 10 | |
| skilzz07 | Hex | 5 | |
| AhmadjAbuzarqa | CERTainly not | 30 | |
| phomai739391 | Crossed Wires | 100 | |
| Eyad_Mamdouh99 | Network Attacks | 5 | |
| mcarrow | Finding Flags | 2 |
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