| Date | User | Challenge | Score |
| kc1 | Structure of AES | 15 | |
| cityzen | Chinese Remainder Theorem | 40 | |
| bankai31337 | Greatest Common Divisor | 15 | |
| khanhlm091 | Passwords as Keys | 50 | |
| Jose2377 | Network Attacks | 5 | |
| bankai31337 | You either know, XOR you don't | 30 | |
| skymagnet | Greatest Common Divisor | 15 | |
| Jose2377 | Great Snakes | 3 | |
| mutsuraev01 | Everything is Still Big | 100 | |
| bankai31337 | Favourite byte | 20 | |
| Jose2377 | Finding Flags | 2 | |
| kc1 | Resisting Bruteforce | 10 | |
| shurayz | Ron was Wrong, Whit is Right | 90 | |
| Hyeonbin | Modes of Operation Starter | 15 | |
| RezaWijayanti | Network Attacks | 5 | |
| kc1 | Keyed Permutations | 5 | |
| Nyunseo | Modes of Operation Starter | 15 | |
| timus_999 | Favourite byte | 20 | |
| shurayz | Vote for Pedro | 150 | |
| tackmin1204 | Merkle Trees | 25 | |
| Mellivora | Resisting Bruteforce | 10 | |
| 0xNoob | Jack's Birthday Confusion | 30 | |
| Hyeonbin | Bringing It All Together | 50 | |
| timus_999 | XOR Properties | 15 | |
| CYCcc | Bringing It All Together | 50 | |
| bankai31337 | XOR Properties | 15 | |
| mutsuraev01 | Crossed Wires | 100 | |
| Hyeonbin | Diffusion through Permutation | 30 | |
| bankai31337 | XOR Starter | 10 | |
| w4rf0t | Marin's Secrets | 50 | |
| kzzm | Oracular Spectacular | 150 | |
| bankai31337 | Bytes and Big Integers | 10 | |
| bankai31337 | Base64 | 10 | |
| Hyeonbin | Confusion through Substitution | 25 | |
| R0b1n | Quadratic Residues | 25 | |
| heatswole | You either know, XOR you don't | 30 | |
| bankai31337 | Hex | 5 | |
| bankai31337 | ASCII | 5 | |
| Hyeonbin | Round Keys | 20 | |
| RIFKITW | Hex | 5 | |
| RicardoBorbon | Modular Arithmetic 1 | 20 | |
| bankai31337 | Great Snakes | 3 | |
| khanhlm091 | Modes of Operation Starter | 15 | |
| fd | Base64 | 10 | |
| mnh | Base64 | 10 | |
| RicardoBorbon | Greatest Common Divisor | 15 | |
| RIFKITW | Base64 | 10 | |
| Hyeonbin | Structure of AES | 15 | |
| bankai31337 | Finding Flags | 2 | |
| mutsuraev01 | Everything is Big | 70 |
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