| Date | User | Challenge | Score |
| Diana09 | Bytes and Big Integers | 10 | |
| Diana09 | Base64 | 10 | |
| Diana09 | Hex | 5 | |
| bsvac | Modular Binomials | 80 | |
| emsa | Efficient Exchange | 50 | |
| zeroday651 | Greatest Common Divisor | 15 | |
| Diana09 | ASCII | 5 | |
| PanagiotisK | You either know, XOR you don't | 30 | |
| radare | Bringing It All Together | 50 | |
| radare | Diffusion through Permutation | 30 | |
| curiousbooker | Finding Flags | 2 | |
| radare | Confusion through Substitution | 25 | |
| Aparaititos | Diffusion through Permutation | 30 | |
| 10ball | Favourite byte | 20 | |
| radare | Round Keys | 20 | |
| mmd1hp | ECB CBC WTF | 55 | |
| radare | Structure of AES | 15 | |
| Adem0 | Fast Primes | 75 | |
| Msaman | XOR Starter | 10 | |
| radare | Resisting Bruteforce | 10 | |
| radare | Keyed Permutations | 5 | |
| AstroHammy | Greatest Common Divisor | 15 | |
| emsa | Curves and Logs | 40 | |
| Msaman | Bytes and Big Integers | 10 | |
| Aparaititos | Confusion through Substitution | 25 | |
| shokapikfort | Monoprime | 30 | |
| Adem0 | Transparency | 50 | |
| Melon_N | Modular Arithmetic 2 | 20 | |
| pepina | Encoding Challenge | 40 | |
| federico27 | Encoding Challenge | 40 | |
| Adem0 | SSH Keys | 35 | |
| radare | Cofactor Cofantasy | 150 | |
| Melon_N | Modular Arithmetic 1 | 20 | |
| toliphye | Adrien's Signs | 80 | |
| jeevous | Modular Inverting | 25 | |
| dXNlcm5hbWU_ | Endless Emails | 150 | |
| pepina | Bytes and Big Integers | 10 | |
| Diego120 | Modular Arithmetic 2 | 20 | |
| Diego120 | Modular Arithmetic 1 | 20 | |
| z3r0cool | Greatest Common Divisor | 15 | |
| Melon_N | Greatest Common Divisor | 15 | |
| helent | Modular Exponentiation | 10 | |
| pepina | Base64 | 10 | |
| 10ball | XOR Properties | 15 | |
| baselsadi1 | Marin's Secrets | 50 | |
| jeevous | Modular Arithmetic 2 | 20 | |
| baselsadi1 | Infinite Descent | 50 | |
| DonAsako | Decrypting TLS 1.3 | 35 | |
| helent | Modes of Operation Starter | 15 | |
| skneww | RSA Decryption | 20 |
You are now level Current level