| Date | User | Challenge | Score |
| hwanhasdfadf | Generators of Groups | 20 | |
| hwanhasdfadf | Working with Fields | 10 | |
| farrukx_7 | Favourite byte | 20 | |
| farrukx_7 | XOR Properties | 15 | |
| hveebe | Extended GCD | 20 | |
| farrukx_7 | XOR Starter | 10 | |
| hk81918 | Base64 | 10 | |
| z1g24g | No Way Back Home | 100 | |
| farrukx_7 | Bytes and Big Integers | 10 | |
| Highlander2 | Parameter Injection | 60 | |
| Uramix | Token Appreciation | 5 | |
| VAWN2303 | XOR Starter | 10 | |
| hveebe | Greatest Common Divisor | 15 | |
| dlesk | Curveball | 100 | |
| spy003 | Passwords as Keys | 50 | |
| Ianneuh | Gaussian Reduction | 50 | |
| Dewin | Bytes and Big Integers | 10 | |
| iniM0n | Modular Square Root | 35 | |
| Vic144 | Background Reading | 5 | |
| cosminradu2603 | Base64 | 10 | |
| Vic144 | Deriving Symmetric Keys | 40 | |
| Vic144 | Computing Shared Secrets | 30 | |
| corentin_bzh | Modes of Operation Starter | 15 | |
| hveebe | You either know, XOR you don't | 30 | |
| iniM0n | Legendre Symbol | 35 | |
| dlesk | Digestive | 60 | |
| philosophe | Adrien's Signs | 80 | |
| JaneX | Great Snakes | 3 | |
| corentin_bzh | Bringing It All Together | 50 | |
| tarakanus10k | You either know, XOR you don't | 30 | |
| d0577 | Adrien's Signs | 80 | |
| alessio27 | Hash Stuffing | 50 | |
| hynxio | ASCII | 5 | |
| khanhlm091 | Confusion through Substitution | 25 | |
| iniM0n | Quadratic Residues | 25 | |
| hveebe | Favourite byte | 20 | |
| alessio27 | Collider | 50 | |
| iniM0n | Modular Inverting | 25 | |
| hynxio | Great Snakes | 3 | |
| iniM0n | Modular Arithmetic 2 | 20 | |
| iniM0n | Modular Arithmetic 1 | 20 | |
| philosophe | Chinese Remainder Theorem | 40 | |
| iniM0n | Extended GCD | 20 | |
| hynxio | Finding Flags | 2 | |
| minjun | Deriving Symmetric Keys | 40 | |
| tarakanus10k | Favourite byte | 20 | |
| Frederik353 | Quadratic Residues | 25 | |
| tarakanus10k | XOR Properties | 15 | |
| hveebe | XOR Properties | 15 | |
| iniM0n | Greatest Common Divisor | 15 |
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