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Submitted Solutions
| Modular Binomials | 1 |
Solved Challenges
| Symmetric Ciphers | CTRIME | 70 | |
| Symmetric Ciphers | Bean Counter | 60 | |
| Symmetric Ciphers | Symmetry | 50 | |
| Symmetric Ciphers | Lazy CBC | 60 | |
| Symmetric Ciphers | Triple DES | 60 | |
| Symmetric Ciphers | Flipping Cookie | 60 | |
| Symmetric Ciphers | ECB Oracle | 60 | |
| Symmetric Ciphers | ECB CBC WTF | 55 | |
| Symmetric Ciphers | Passwords as Keys | 50 | |
| Symmetric Ciphers | Modes of Operation Starter | 15 | |
| Symmetric Ciphers | Bringing It All Together | 50 | |
| Symmetric Ciphers | Diffusion through Permutation | 30 | |
| Symmetric Ciphers | Confusion through Substitution | 25 | |
| Symmetric Ciphers | Round Keys | 20 | |
| Symmetric Ciphers | Structure of AES | 15 | |
| Symmetric Ciphers | Resisting Bruteforce | 10 | |
| General | SSH Keys | 35 | |
| Mathematics | Modular Binomials | 80 | |
| Mathematics | Adrien's Signs | 80 | |
| Mathematics | Gaussian Reduction | 50 | |
| Symmetric Ciphers | Keyed Permutations | 5 | |
| Mathematics | What's a Lattice? | 40 | |
| Mathematics | Gram Schmidt | 30 | |
| Mathematics | Chinese Remainder Theorem | 40 | |
| Mathematics | Modular Square Root | 35 | |
| Mathematics | Legendre Symbol | 35 | |
| Mathematics | Quadratic Residues | 25 | |
| Mathematics | Prime and Prejudice | 200 | |
| Hash Functions | Mixed Up | 120 | |
| Misc | No Leaks | 100 | |
| Misc | Gotta Go Fast | 40 | |
| Crypto on the Web | JSON in JSON | 40 | |
| Crypto on the Web | RSA or HMAC? | 35 | |
| Crypto on the Web | JWT Secrets | 25 | |
| Crypto on the Web | No Way JOSE | 20 | |
| Crypto on the Web | JWT Sessions | 10 | |
| Crypto on the Web | Token Appreciation | 5 | |
| General | Transparency | 50 | |
| General | CERTainly not | 30 | |
| General | Privacy-Enhanced Mail? | 25 | |
| General | Modular Inverting | 25 | |
| General | Modular Arithmetic 2 | 20 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Extended GCD | 20 | |
| General | Greatest Common Divisor | 15 | |
| General | Lemur XOR | 40 | |
| General | You either know, XOR you don't | 30 | |
| General | Favourite byte | 20 | |
| General | XOR Properties | 15 | |
| General | XOR Starter | 10 | |
| General | Encoding Challenge | 40 | |
| Introduction | Network Attacks | 5 | |
| Introduction | Great Snakes | 3 | |
| General | Bytes and Big Integers | 10 | |
| General | Base64 | 10 | |
| General | Hex | 5 | |
| General | ASCII | 5 | |
| Introduction | Finding Flags | 2 | |
| Mathematics | Size and Basis | 15 | |
| Mathematics | Vectors | 10 | |
| Mathematics | Successive Powers | 60 |
