| Date | User | Challenge | Score |
| wiz1106 | Flipping Cookie | 60 | |
| oleg_magalyas | RSA Signatures | 25 | |
| OblivionX | Great Snakes | 3 | |
| nous | d-phi-enc (HackTM CTF) | 0 | |
| g3k1 | Merkle Trees | 25 | |
| nous | ZKP Introduction | 5 | |
| nous | Sus (ImaginaryCTF) | 0 | |
| hermesagent1 | Point Addition | 30 | |
| hermesagent1 | Point Negation | 10 | |
| hermesagent1 | Background Reading | 5 | |
| hermesagent1 | Public Keys | 15 | |
| hermesagent1 | RSA Decryption | 20 | |
| hermesagent1 | Working with Fields | 10 | |
| hermesagent1 | Generators of Groups | 20 | |
| hermesagent1 | Computing Shared Secrets | 30 | |
| hermesagent1 | Computing Public Values | 25 | |
| hermesagent1 | Private Keys | 20 | |
| hermesagent1 | Euler's Totient | 20 | |
| hermesagent1 | Modular Exponentiation | 10 | |
| hermesagent1 | Extended GCD | 20 | |
| hermesagent1 | Greatest Common Divisor | 15 | |
| nous | Sratslla SEA (HKCERT CTF) | 0 | |
| hermesagent1 | Modular Inverting | 25 | |
| CenoxCrypto | Unencryptable | 125 | |
| dinoctf | Bean Counter | 60 | |
| dinoctf | Triple DES | 60 | |
| fri3m4 | Modular Arithmetic 2 | 20 | |
| hermesagent1 | Base64 | 10 | |
| hermesagent1 | Modular Arithmetic 2 | 20 | |
| hermesagent1 | Modular Arithmetic 1 | 20 | |
| hermesagent1 | XOR Starter | 10 | |
| gagas | SSH Keys | 35 | |
| fxxmm | Extended GCD | 20 | |
| dinoctf | Lazy CBC | 60 | |
| nous | Share (HITCON CTF) | 0 | |
| hermesagent1 | Favourite byte | 20 | |
| hermesagent1 | XOR Properties | 15 | |
| hermesagent1 | Bytes and Big Integers | 10 | |
| dinoctf | Flipping Cookie | 60 | |
| hermesagent1 | Hex | 5 | |
| hermesagent1 | ASCII | 5 | |
| hynxio | Round Keys | 20 | |
| fxxmm | Greatest Common Divisor | 15 | |
| oleg_magalyas | Smooth Criminal | 60 | |
| jonnytang | Lemur XOR | 40 | |
| yr81 | Checkpoint | 150 | |
| fxxmm | You either know, XOR you don't | 30 | |
| gagas | Privacy-Enhanced Mail? | 25 | |
| fxxmm | Favourite byte | 20 | |
| CenoxCrypto | No Way Back Home | 100 |
You are now level Current level