| Date | User | Challenge | Score |
| wekito | Bad Temper | 130 | |
| lu30 | You either know, XOR you don't | 30 | |
| fsociety4174 | ASCII | 5 | |
| markek_eth | Bytes and Big Integers | 10 | |
| Nduta | ASCII | 5 | |
| Arwa_45 | SSH Keys | 35 | |
| fsociety4174 | Great Snakes | 3 | |
| acorrege | Bean Counter | 60 | |
| Eliott | Round Keys | 20 | |
| fsociety4174 | Finding Flags | 2 | |
| Nduta | Great Snakes | 3 | |
| Nduta | Finding Flags | 2 | |
| jinx007 | Favourite byte | 20 | |
| markek_eth | Base64 | 10 | |
| marv1nh | XOR Starter | 10 | |
| migcast | Hex | 5 | |
| FMSane | Favourite byte | 20 | |
| markek_eth | Hex | 5 | |
| openground | Passwords as Keys | 50 | |
| labyrinth0 | Quadratic Residues | 25 | |
| markek_eth | ASCII | 5 | |
| v1ct1g3r | Chinese Remainder Theorem | 40 | |
| FMSane | XOR Properties | 15 | |
| migcast | ASCII | 5 | |
| demr | Noise Free | 40 | |
| zacktoxicboy | Modular Arithmetic 1 | 20 | |
| openground | Modes of Operation Starter | 15 | |
| zacktoxicboy | Extended GCD | 20 | |
| zacktoxicboy | Greatest Common Divisor | 15 | |
| migcast | Great Snakes | 3 | |
| acorrege | Symmetry | 50 | |
| Arwa_45 | CERTainly not | 30 | |
| markek_eth | Great Snakes | 3 | |
| migcast | Finding Flags | 2 | |
| lu30 | Favourite byte | 20 | |
| markek_eth | Finding Flags | 2 | |
| deep_blueshell | Bytes and Big Integers | 10 | |
| marv1nh | Bytes and Big Integers | 10 | |
| Arwa_45 | Privacy-Enhanced Mail? | 25 | |
| openground | Bringing It All Together | 50 | |
| BrandonMon | Favourite byte | 20 | |
| Venom123 | Finding Flags | 2 | |
| lu30 | XOR Properties | 15 | |
| jinx007 | XOR Properties | 15 | |
| mdplivinay | Great Snakes | 3 | |
| cosminm53 | Curves and Logs | 40 | |
| mdplivinay | Finding Flags | 2 | |
| BrandonMon | XOR Properties | 15 | |
| openground | Diffusion through Permutation | 30 | |
| TheMarcsOv | Chinese Remainder Theorem | 40 |
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