| Date | User | Challenge | Score |
| enricof | Keyed Permutations | 5 | |
| jgoebel | Jack's Birthday Hash | 20 | |
| enricof | Bytes and Big Integers | 10 | |
| Marabloo | Great Snakes | 3 | |
| hamzaALkhouly | Modular Inverting | 25 | |
| wipe | Bytes and Big Integers | 10 | |
| enricof | Base64 | 10 | |
| cubaureo | Encoding Challenge | 40 | |
| aksamautu55 | ASCII | 5 | |
| wipe | Base64 | 10 | |
| Ianneuh | Size and Basis | 15 | |
| jgoebel | Jack's Birthday Confusion | 30 | |
| see0 | Adrien's Signs | 80 | |
| Marabloo | Finding Flags | 2 | |
| wipe | Hex | 5 | |
| enricof | Hex | 5 | |
| hamzaALkhouly | Modular Arithmetic 2 | 20 | |
| enricof | ASCII | 5 | |
| zczjyq | Generators of Groups | 20 | |
| NatsuGwada | Bean Counter | 60 | |
| enricof | Great Snakes | 3 | |
| ericoblaza | Bean Counter | 60 | |
| jas1618 | Bytes and Big Integers | 10 | |
| enricof | Finding Flags | 2 | |
| K7L33L | Finding Flags | 2 | |
| Ianneuh | Vectors | 10 | |
| cubaureo | Network Attacks | 5 | |
| erickao | Base64 | 10 | |
| MatteB_01 | You either know, XOR you don't | 30 | |
| zczjyq | Working with Fields | 10 | |
| alchemist7 | Background Reading | 5 | |
| Eason | Finding Flags | 2 | |
| maskmovdqu | Parameter Injection | 60 | |
| jgoebel | Factoring | 15 | |
| ericoblaza | Symmetry | 50 | |
| KK5559D | Legendre Symbol | 35 | |
| hamzaALkhouly | Modular Arithmetic 1 | 20 | |
| Ianneuh | Public Keys | 15 | |
| MatteB_01 | Favourite byte | 20 | |
| hamzaALkhouly | Extended GCD | 20 | |
| MatteB_01 | XOR Properties | 15 | |
| Ianneuh | Modular Exponentiation | 10 | |
| resowifix | Network Attacks | 5 | |
| cubaureo | Modular Inverting | 25 | |
| MatteB_01 | XOR Starter | 10 | |
| MatteB_01 | Bytes and Big Integers | 10 | |
| MatteB_01 | Base64 | 10 | |
| MatteB_01 | Hex | 5 | |
| MatteB_01 | ASCII | 5 | |
| ghovhann | JWT Sessions | 10 |
You are now level Current level