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Solved Challenges
| Mathematics | Adrien's Signs | 80 | |
| Mathematics | Quadratic Residues | 25 | |
| Mathematics | Modular Square Root | 35 | |
| Mathematics | Legendre Symbol | 35 | |
| General | Modular Inverting | 25 | |
| General | Extended GCD | 20 | |
| Crypto on the Web | Secure Protocols | 5 | |
| 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 | Modular Arithmetic 2 | 20 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Lemur XOR | 40 | |
| 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 | Logon Zero | 80 | |
| Elliptic Curves | Point Addition | 30 | |
| Diffie-Hellman | Parameter Injection | 60 | |
| Hash Functions | MD0 | 80 | |
| Diffie-Hellman | Export-grade | 100 | |
| Elliptic Curves | Efficient Exchange | 50 | |
| Elliptic Curves | Curves and Logs | 40 | |
| Diffie-Hellman | Additive | 70 | |
| Symmetric Ciphers | Stream of Consciousness | 80 | |
| Symmetric Ciphers | CTRIME | 70 | |
| Symmetric Ciphers | Bean Counter | 60 | |
| Symmetric Ciphers | Triple DES | 60 | |
| Symmetric Ciphers | Lazy CBC | 60 | |
| Symmetric Ciphers | ECB Oracle | 60 | |
| Symmetric Ciphers | Flipping Cookie | 60 | |
| RSA | Signing Server | 60 | |
| RSA | Fast Primes | 75 | |
| RSA | Marin's Secrets | 50 | |
| RSA | Infinite Descent | 50 | |
| RSA | Crossed Wires | 100 | |
| Mathematics | Broken RSA | 100 | |
| Mathematics | Chinese Remainder Theorem | 40 | |
| General | Greatest Common Divisor | 15 | |
| General | You either know, XOR you don't | 30 | |
| General | Favourite byte | 20 | |
| General | XOR Properties | 15 | |
| General | Encoding Challenge | 40 | |
| RSA | Manyprime | 40 | |
| RSA | Square Eyes | 35 | |
| RSA | Monoprime | 30 | |
| RSA | Inferius Prime | 30 | |
| RSA | Factoring | 15 | |
| RSA | RSA Signatures | 25 | |
| RSA | RSA Decryption | 20 | |
| RSA | Private Keys | 20 | |
| RSA | Euler's Totient | 20 | |
| RSA | Public Keys | 15 | |
| RSA | Modular Exponentiation | 10 | |
| Symmetric Ciphers | Resisting Bruteforce | 10 | |
| Symmetric Ciphers | Keyed Permutations | 5 | |
| General | ASCII | 5 | |
| General | XOR Starter | 10 | |
| General | Bytes and Big Integers | 10 | |
| General | Hex | 5 | |
| General | Base64 | 10 | |
| Introduction | Network Attacks | 5 | |
| Introduction | Great Snakes | 3 | |
| Introduction | Finding Flags | 2 |
