| Date | User | Challenge | Score |
| mgk91 | ASCII | 5 | |
| yuna78125 | Finding Flags | 2 | |
| ferrat | Bounded Noise | 50 | |
| mgk91 | Great Snakes | 3 | |
| dliang2654 | Great Snakes | 3 | |
| marduk666 | ASCII | 5 | |
| mgk91 | Finding Flags | 2 | |
| crypto_saka_hack | Stream of Consciousness | 80 | |
| Gryfman | Square Eyes | 35 | |
| Kimurar153 | XOR Starter | 10 | |
| hahaHAHAxing | Hex | 5 | |
| huahdfhdf | Jack's Birthday Hash | 20 | |
| AKHACKER | Bytes and Big Integers | 10 | |
| Denis_Roc | Let's Decrypt Again | 175 | |
| Cofactor Cofantasy | 150 | ||
| AKHACKER | Base64 | 10 | |
| Gryfman | Monoprime | 30 | |
| hahaHAHAxing | Euler's Totient | 20 | |
| AKHACKER | Hex | 5 | |
| Musca | Diffusion through Permutation | 30 | |
| hahaHAHAxing | Public Keys | 15 | |
| hahaHAHAxing | Modular Exponentiation | 10 | |
| marduk666 | Great Snakes | 3 | |
| ViktorPetrovich | Passwords as Keys | 50 | |
| emanu | Deriving Symmetric Keys | 40 | |
| qwra | Everything is Big | 70 | |
| samlev | Resisting Bruteforce | 10 | |
| ViktorPetrovich | Modes of Operation Starter | 15 | |
| ViktorPetrovich | Bringing It All Together | 50 | |
| marduk666 | Finding Flags | 2 | |
| shreshth44 | Double and Broken | 50 | |
| didatgi | You either know, XOR you don't | 30 | |
| Jilian | Deriving Symmetric Keys | 40 | |
| hahaHAHAxing | Quadratic Residues | 25 | |
| Unencryptable | 125 | ||
| Musca | Confusion through Substitution | 25 | |
| Jilian | Computing Shared Secrets | 30 | |
| samlev | Keyed Permutations | 5 | |
| Roll your Own | 125 | ||
| Ellipse Curve Cryptography | 125 | ||
| Kimurar153 | Bytes and Big Integers | 10 | |
| ViktorPetrovich | Diffusion through Permutation | 30 | |
| ViktorPetrovich | Confusion through Substitution | 25 | |
| didatgi | Favourite byte | 20 | |
| ViktorPetrovich | Round Keys | 20 | |
| Jilian | Generators of Groups | 20 | |
| Gryfman | Inferius Prime | 30 | |
| No Way Back Home | 100 | ||
| hahaHAHAxing | Resisting Bruteforce | 10 | |
| ViktorPetrovich | Structure of AES | 15 |
You are now level Current level