| Date | User | Challenge | Score |
| badw1r3d | Network Attacks | 5 | |
| happyLYY | Lemur XOR | 40 | |
| xvyi | Jack's Birthday Hash | 20 | |
| networkfluff | XOR Starter | 10 | |
| jetpack | XOR Properties | 15 | |
| whishys | Jack's Birthday Confusion | 30 | |
| hlpkv | ASCII | 5 | |
| bgtyhgb | Public Keys | 15 | |
| pingas | Base64 | 10 | |
| bgtyhgb | Modular Exponentiation | 10 | |
| G30 | Modular Inverting | 25 | |
| JasperDragon | Private Keys | 20 | |
| hlpkv | Great Snakes | 3 | |
| kotoko | You either know, XOR you don't | 30 | |
| JasperDragon | RSA Decryption | 20 | |
| whishys | Jack's Birthday Hash | 20 | |
| pingas | Hex | 5 | |
| networkfluff | Bytes and Big Integers | 10 | |
| hlpkv | Finding Flags | 2 | |
| lovingmachine3 | Great Snakes | 3 | |
| networkfluff | Base64 | 10 | |
| Dessert | Blinding Light | 120 | |
| Vin_cent | Adrien's Signs | 80 | |
| networkfluff | Hex | 5 | |
| networkfluff | ASCII | 5 | |
| networkfluff | Great Snakes | 3 | |
| networkfluff | Finding Flags | 2 | |
| Gabrielius | Bytes and Big Integers | 10 | |
| Vin_cent | Bringing It All Together | 50 | |
| kotoko | Lemur XOR | 40 | |
| happyLYY | You either know, XOR you don't | 30 | |
| lovingmachine3 | Finding Flags | 2 | |
| guy_gart | Extended GCD | 20 | |
| G30 | Modular Arithmetic 2 | 20 | |
| happyLYY | Favourite byte | 20 | |
| Abyss404 | Hex | 5 | |
| happyLYY | XOR Properties | 15 | |
| Abyss404 | ASCII | 5 | |
| RachaelSarah | Monoprime | 30 | |
| kwakucyber | ASCII | 5 | |
| happyLYY | Encoding Challenge | 40 | |
| Dessert | Let's Decrypt | 80 | |
| RachaelSarah | Factoring | 15 | |
| michal3v | XOR Starter | 10 | |
| Abyss404 | Great Snakes | 3 | |
| RachaelSarah | RSA Signatures | 25 | |
| feynhat | Diffusion through Permutation | 30 | |
| caius | Passwords as Keys | 50 | |
| Vin_cent | Bean Counter | 60 | |
| st83 | Great Snakes | 3 |
You are now level Current level