| Date | User | Challenge | Score |
| coreDumped79 | Favourite byte | 20 | |
| spaceman_spiff | Network Attacks | 5 | |
| mjm | Base64 | 10 | |
| yr81 | LWE Intro | 10 | |
| mjm | Hex | 5 | |
| yr81 | LWE Background | 5 | |
| mjm | ASCII | 5 | |
| coreDumped79 | XOR Properties | 15 | |
| seheesf88 | Hex | 5 | |
| mjm | Great Snakes | 3 | |
| seheesf88 | ASCII | 5 | |
| mjm | Finding Flags | 2 | |
| JayHeleno | Bytes and Big Integers | 10 | |
| coreDumped79 | XOR Starter | 10 | |
| abolfazl_dehghan | ASCII | 5 | |
| abolfazl_dehghan | Great Snakes | 3 | |
| asfd98123rejk | Square Eyes | 35 | |
| asfd98123rejk | Inferius Prime | 30 | |
| djo | Favourite byte | 20 | |
| asfd98123rejk | Monoprime | 30 | |
| yr81 | Backpack Cryptography | 120 | |
| whishys | You either know, XOR you don't | 30 | |
| asfd98123rejk | Modulus Inutilis | 50 | |
| whishys | Favourite byte | 20 | |
| iori | Network Attacks | 5 | |
| djo | XOR Properties | 15 | |
| RachaelSarah | Resisting Bruteforce | 10 | |
| RachaelSarah | Keyed Permutations | 5 | |
| ataonder | Modular Arithmetic 2 | 20 | |
| ataonder | Modular Arithmetic 1 | 20 | |
| ataonder | Extended GCD | 20 | |
| ataonder | Greatest Common Divisor | 15 | |
| derPinguin | Favourite byte | 20 | |
| ataonder | You either know, XOR you don't | 30 | |
| djo | XOR Starter | 10 | |
| Huskiness2945 | ASCII | 5 | |
| ataonder | Favourite byte | 20 | |
| Huskiness2945 | Great Snakes | 3 | |
| djo | Bytes and Big Integers | 10 | |
| derPinguin | XOR Properties | 15 | |
| Huskiness2945 | Finding Flags | 2 | |
| ataonder | XOR Properties | 15 | |
| derPinguin | XOR Starter | 10 | |
| derPinguin | Bytes and Big Integers | 10 | |
| spaceman_spiff | Hex | 5 | |
| Alusi | Finding Flags | 2 | |
| djo | Base64 | 10 | |
| ataonder | XOR Starter | 10 | |
| ataonder | Bytes and Big Integers | 10 | |
| ataonder | Base64 | 10 |
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