| Date | User | Challenge | Score |
| kayden0x0 | Hex | 5 | |
| EventSch | Modular Arithmetic 1 | 20 | |
| AryaNarkhede | Modular Inverting | 25 | |
| Aldeke | Modes of Operation Starter | 15 | |
| AryaNarkhede | Modular Arithmetic 2 | 20 | |
| Aldeke | Bringing It All Together | 50 | |
| succe_ed | Quadratic Residues | 25 | |
| Aldeke | Diffusion through Permutation | 30 | |
| TTING | Generators of Groups | 20 | |
| kayden0x0 | ASCII | 5 | |
| succe_ed | Chinese Remainder Theorem | 40 | |
| kayden0x0 | Great Snakes | 3 | |
| Max009 | Point Addition | 30 | |
| succe_ed | Successive Powers | 60 | |
| koggy | Logon Zero | 80 | |
| Aldeke | Confusion through Substitution | 25 | |
| Aldeke | Round Keys | 20 | |
| boxlegs | Confusion through Substitution | 25 | |
| Huyyeuthu2104 | Legendre Symbol | 35 | |
| succe_ed | Keyed Permutations | 5 | |
| Molejo | XOR Properties | 15 | |
| JembatanLayang | Hex | 5 | |
| Prv_88 | You either know, XOR you don't | 30 | |
| JembatanLayang | ASCII | 5 | |
| JembatanLayang | Great Snakes | 3 | |
| boxlegs | Round Keys | 20 | |
| boxlegs | Structure of AES | 15 | |
| SkyeStealsLemons | RSA Backdoor Viability | 175 | |
| SkyeStealsLemons | Marin's Secrets | 50 | |
| SkyeStealsLemons | Infinite Descent | 50 | |
| hthh | Bean Counter | 60 | |
| Molejo | XOR Starter | 10 | |
| cokernel | You either know, XOR you don't | 30 | |
| Molejo | Bytes and Big Integers | 10 | |
| cokernel | Favourite byte | 20 | |
| cokernel | XOR Properties | 15 | |
| Molejo | Base64 | 10 | |
| cokernel | XOR Starter | 10 | |
| cokernel | Bytes and Big Integers | 10 | |
| nisuu | Jack's Birthday Confusion | 30 | |
| cokernel | Base64 | 10 | |
| cokernel | Hex | 5 | |
| ShadetheAvali | Quadratic Residues | 25 | |
| cokernel | ASCII | 5 | |
| cokernel | Great Snakes | 3 | |
| cokernel | Finding Flags | 2 | |
| nisuu | Jack's Birthday Hash | 20 | |
| boxlegs | Resisting Bruteforce | 10 | |
| Prv_88 | Favourite byte | 20 | |
| Molejo | Hex | 5 |
You are now level Current level