| Date | User | Challenge | Score |
| melnicek | Dancing Queen | 120 | |
| melnicek | Logon Zero | 80 | |
| melnicek | Stream of Consciousness | 80 | |
| melnicek | Triple DES | 60 | |
| melnicek | Lazy CBC | 60 | |
| melnicek | Symmetry | 50 | |
| melnicek | ECB CBC WTF | 55 | |
| melnicek | Passwords as Keys | 50 | |
| melnicek | Modes of Operation Starter | 15 | |
| melnicek | Keyed Permutations | 5 | |
| melnicek | Bringing It All Together | 50 | |
| melnicek | Diffusion through Permutation | 30 | |
| melnicek | Confusion through Substitution | 25 | |
| melnicek | Round Keys | 20 | |
| melnicek | Structure of AES | 15 | |
| fjukh7872 | Mister Saplin's Preview | 80 | |
| mariamirabela | Bytes and Big Integers | 10 | |
| cubaureo | Base64 | 10 | |
| Wolfle | Hex | 5 | |
| mypalpal | Everything is Big | 70 | |
| Z3U55 | RSA or HMAC? | 35 | |
| GeorgeAziz | SSH Keys | 35 | |
| florizz | Finding Flags | 2 | |
| josephcmac | RSA Signatures | 25 | |
| Wolfle | ASCII | 5 | |
| mariamirabela | Base64 | 10 | |
| fjukh7872 | Pairing-Based Cryptography | 50 | |
| cubaureo | Hex | 5 | |
| gumbat70 | TLS Handshake | 15 | |
| kyberblade | You either know, XOR you don't | 30 | |
| Kymba | Hex | 5 | |
| melnicek | Transparency | 50 | |
| melnicek | SSH Keys | 35 | |
| melnicek | CERTainly not | 30 | |
| GeorgeAziz | CERTainly not | 30 | |
| mariamirabela | Hex | 5 | |
| melnicek | Privacy-Enhanced Mail? | 25 | |
| melnicek | Modular Inverting | 25 | |
| AzureXblue | Quadratic Residues | 25 | |
| melnicek | Modular Arithmetic 2 | 20 | |
| melnicek | Modular Arithmetic 1 | 20 | |
| kyberblade | Favourite byte | 20 | |
| melnicek | Extended GCD | 20 | |
| gumbat70 | Sharks on the Wire | 10 | |
| melnicek | Greatest Common Divisor | 15 | |
| melnicek | Lemur XOR | 40 | |
| Wolfle | Great Snakes | 3 | |
| melnicek | You either know, XOR you don't | 30 | |
| melnicek | Favourite byte | 20 | |
| melnicek | XOR Properties | 15 |
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