CryptoHack

CryptoHack is platform for learning modern cryptography. You can learn about modern cryptographic protocols by solving a series of interactive puzzles and challenges. Here I share answers to those challenges.

Challenges solved:

1. Introduction

• Finding Flags
• Great Snakes
• Network Attacks

2. General

2.1 Encoding

• ASCII
• Hex
• Base64
• Bytes and Big Integers
• Encoding Challenge

2.2 XOR

• XOR Starter
• XOR Properties
• Favourite byte
• You either know, XOR you don't
• Lemur XOR

2.3 Mathematics

• Greatest Common Divisor
• Extended GCD
• Modular Arithmetic 1
• Modular Arithmetic 2
• Modular Inverting

2.4 Data Formats

• Privacy-Enhanced Mail?
• CERTainly not