| Date | User | Challenge | Score |
| Beethoven3 | Cofactor Cofantasy | 150 | |
| sudoDaniel | Great Snakes | 3 | |
| sudoDaniel | Finding Flags | 2 | |
| wersytt | You either know, XOR you don't | 30 | |
| efuentes41664 | Confusion through Substitution | 25 | |
| wersytt | Favourite byte | 20 | |
| ramonacaprariu | XOR Starter | 10 | |
| wersytt | XOR Properties | 15 | |
| FazeCT | Modes of Operation Starter | 15 | |
| ramonacaprariu | Bytes and Big Integers | 10 | |
| wersytt | XOR Starter | 10 | |
| Aminah_12op | Finding Flags | 2 | |
| Krumpel | You either know, XOR you don't | 30 | |
| wersytt | Bytes and Big Integers | 10 | |
| Krumpel | Favourite byte | 20 | |
| efuentes41664 | Round Keys | 20 | |
| FazeCT | Modulus Inutilis | 50 | |
| FazeCT | Salty | 20 | |
| Krumpel | XOR Properties | 15 | |
| efuentes41664 | Structure of AES | 15 | |
| SuperCat | Generators of Groups | 20 | |
| efuentes41664 | Resisting Bruteforce | 10 | |
| jchilczuk | Cofactor Cofantasy | 150 | |
| efuentes41664 | Keyed Permutations | 5 | |
| SuperCat | Working with Fields | 10 | |
| Krumpel | XOR Starter | 10 | |
| FazeCT | Monoprime | 30 | |
| FazeCT | Inferius Prime | 30 | |
| FazeCT | Factoring | 15 | |
| FazeCT | RSA Decryption | 20 | |
| GettingNowhere | Finding Flags | 2 | |
| FazeCT | Private Keys | 20 | |
| FazeCT | Euler's Totient | 20 | |
| FazeCT | Public Keys | 15 | |
| FazeCT | Modular Exponentiation | 10 | |
| FazeCT | Bytes and Big Integers | 10 | |
| FazeCT | Base64 | 10 | |
| FazeCT | Hex | 5 | |
| FazeCT | ASCII | 5 | |
| FazeCT | Network Attacks | 5 | |
| FazeCT | Great Snakes | 3 | |
| FazeCT | Finding Flags | 2 | |
| DunkinDonnies | Base64 | 10 | |
| kamiii_ | ASCII | 5 | |
| fantom | Resisting Bruteforce | 10 | |
| kamiii_ | Great Snakes | 3 | |
| jchilczuk | Real Eisenstein | 150 | |
| DunkinDonnies | Hex | 5 | |
| kamiii_ | Finding Flags | 2 | |
| DunkinDonnies | ASCII | 5 |
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