art13
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Level: 1
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Solved Challenges
| General | Extended GCD | 20 | |
| General | Greatest Common Divisor | 15 | |
| Symmetric Ciphers | Confusion through Substitution | 25 | |
| General | XOR Properties | 15 | |
| General | Favourite byte | 20 | |
| Symmetric Ciphers | Round Keys | 20 | |
| Symmetric Ciphers | Structure of AES | 15 | |
| Symmetric Ciphers | Resisting Bruteforce | 10 | |
| Symmetric Ciphers | Keyed Permutations | 5 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Privacy-Enhanced Mail? | 25 | |
| Crypto on the Web | Token Appreciation | 5 | |
| General | Encoding Challenge | 40 | |
| Introduction | Network Attacks | 5 | |
| General | XOR Starter | 10 | |
| General | Bytes and Big Integers | 10 | |
| General | Base64 | 10 | |
| General | Hex | 5 | |
| General | ASCII | 5 | |
| Introduction | Great Snakes | 3 | |
| Introduction | Finding Flags | 2 |
