| Date | User | Challenge | Score |
| Dimitris_Toulis | Encoding Challenge | 40 | |
| sury666 | Efficient Exchange | 50 | |
| n0v4_4v0n | Favourite byte | 20 | |
| chachaeric | Hex | 5 | |
| sury666 | Curves and Logs | 40 | |
| n0v4_4v0n | XOR Properties | 15 | |
| Hygene | SSH Keys | 35 | |
| tacex_ | Monoprime | 30 | |
| sury666 | Scalar Multiplication | 35 | |
| sury666 | Point Addition | 30 | |
| qad7o | XOR Properties | 15 | |
| renesh_v | ASCII | 5 | |
| Dimitris_Toulis | Transparency | 50 | |
| ian5v | Lemur XOR | 40 | |
| chachaeric | ASCII | 5 | |
| tacex_ | Factoring | 15 | |
| brawl02 | You either know, XOR you don't | 30 | |
| chachaeric | Great Snakes | 3 | |
| brobinh | Manyprime | 40 | |
| Sayans | Finding Flags | 2 | |
| rraghad | Passwords as Keys | 50 | |
| sury666 | Point Negation | 10 | |
| renesh_v | Great Snakes | 3 | |
| neurodafer | Bytes and Big Integers | 10 | |
| rraghad | Modes of Operation Starter | 15 | |
| tacex_ | RSA Signatures | 25 | |
| n0v4_4v0n | XOR Starter | 10 | |
| brawl02 | Favourite byte | 20 | |
| rraghad | Bringing It All Together | 50 | |
| crypt0maniac | Bytes and Big Integers | 10 | |
| rraghad | Diffusion through Permutation | 30 | |
| tacex_ | RSA Decryption | 20 | |
| tacex_ | Private Keys | 20 | |
| sury666 | Background Reading | 5 | |
| brobinh | Monoprime | 30 | |
| tacex_ | Euler's Totient | 20 | |
| rraghad | Confusion through Substitution | 25 | |
| tacex_ | Public Keys | 15 | |
| renesh_v | Finding Flags | 2 | |
| rraghad | Round Keys | 20 | |
| flooeg | Keyed Permutations | 5 | |
| tacex_ | Modular Exponentiation | 10 | |
| qad7o | XOR Starter | 10 | |
| rraghad | Structure of AES | 15 | |
| tacex_ | Bean Counter | 60 | |
| crypt0maniac | Base64 | 10 | |
| rraghad | Resisting Bruteforce | 10 | |
| rraghad | Keyed Permutations | 5 | |
| rraghad | Network Attacks | 5 | |
| n0v4_4v0n | Bytes and Big Integers | 10 |
You are now level Current level