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Solved Challenges
| RSA | Signing Server | 60 | |
| RSA | Square Eyes | 35 | |
| RSA | Monoprime | 30 | |
| RSA | Inferius Prime | 30 | |
| RSA | Factoring | 15 | |
| RSA | RSA Starter 6 | 25 | |
| RSA | RSA Starter 5 | 20 | |
| RSA | RSA Starter 4 | 20 | |
| RSA | RSA Starter 3 | 20 | |
| RSA | RSA Starter 2 | 15 | |
| RSA | RSA Starter 1 | 10 | |
| Symmetric Ciphers | Stream of Consciousness | 80 | |
| Mathematics | Size and Basis | 15 | |
| Mathematics | Vectors | 10 | |
| Mathematics | Modular Square Root | 35 | |
| Mathematics | Legendre Symbol | 35 | |
| Mathematics | Quadratic Residues | 25 | |
| Crypto on the Web | Saying Hello | 20 | |
| Crypto on the Web | TLS Handshake | 15 | |
| Crypto on the Web | Sharks on the Wire | 10 | |
| Crypto on the Web | Secure Protocols | 5 | |
| Misc | No Leaks | 100 | |
| Misc | Gotta Go Fast | 40 | |
| Misc | Bruce Schneier's Password | 100 | |
| Symmetric Ciphers | Logon Zero | 80 | |
| Symmetric Ciphers | CTRIME | 70 | |
| Symmetric Ciphers | Triple DES | 60 | |
| Symmetric Ciphers | Lazy CBC | 60 | |
| Symmetric Ciphers | ECB Oracle | 60 | |
| Symmetric Ciphers | Flipping Cookie | 60 | |
| Symmetric Ciphers | Bean Counter | 60 | |
| 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 | Symmetry | 50 | |
| Symmetric Ciphers | ECB CBC WTF | 55 | |
| Symmetric Ciphers | Passwords as Keys | 50 | |
| Symmetric Ciphers | Modes of Operation Starter | 15 | |
| General | Modular Inverting | 25 | |
| General | Modular Arithmetic 2 | 20 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Extended GCD | 20 | |
| General | Greatest Common Divisor | 15 | |
| Crypto on the Web | JWT Sessions | 10 | |
| Crypto on the Web | Token Appreciation | 5 | |
| Elliptic Curves | Background Reading | 5 | |
| Symmetric Ciphers | Resisting Bruteforce | 10 | |
| Symmetric Ciphers | Keyed Permutations | 5 | |
| General | Transparency | 50 | |
| General | SSH Keys | 35 | |
| General | CERTainly not | 30 | |
| General | Privacy-Enhanced Mail? | 25 | |
| General | Encoding Challenge | 40 | |
| Introduction | Network Attacks | 5 | |
| 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 | Bytes and Big Integers | 10 | |
| General | Base64 | 10 | |
| General | Hex | 5 | |
| General | ASCII | 5 | |
| Introduction | Great Snakes | 3 | |
| Introduction | Finding Flags | 2 |
