Introduction

What to expect

Cryptography is all about encrypting messages securely. Sometimes, these encryptions are not done securely. The goal of the challenges in this category is to find a vulnerability in the cryptographic function that is being used and decrypt the secret message (the flag).

Types of challenges (not an exhaustive list)

• Cracking classic cryptography like transposition ciphers or substitution ciphers
• Cracking modern ciphers (like RSA or AES) that have an unsecure configuration
• Cracking an unsecure random number generator

Skills required (or Motivation to learn)

• Recognizing classic ciphers
• Willing to learn mathematical concepts around modern cryptography