Symmetric Ciphers | Resisting Bruteforce | 10 | |
General | Encoding Challenge | 40 | |
Mathematics | Modular Square Root | 35 | |
Mathematics | Legendre Symbol | 35 | |
Crypto on the Web | JWT Secrets | 25 | |
Mathematics | Quadratic Residues | 25 | |
General | Modular Inverting | 25 | |
General | Modular Arithmetic 2 | 20 | |
General | Modular Arithmetic 1 | 20 | |
General | Extended GCD | 20 | |
Symmetric Ciphers | Keyed Permutations | 5 | |
Crypto on the Web | No Way JOSE | 20 | |
Crypto on the Web | JWT Sessions | 10 | |
Crypto on the Web | Token Appreciation | 5 | |
General | Greatest Common Divisor | 15 | |
General | Lemur XOR | 40 | |
Introduction | Network Attacks | 5 | |
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 |
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