What is Cryptography?

Cryptography is the study of techniques for secure communication in the presence of third parties, known as adversaries. It involves transforming information into a code or cipher to hide its meaning from unauthorized parties, as well as transforming the code back into its original form for authorized parties to read. Cryptography is used in a variety of applications, including secure communication over the internet, protecting financial transactions, and verifying the authenticity of digital signatures.

How these challenges work?

In cryptography-based Capture the Flag (CTF) challenges, different cryptography techniques and methods are used to test a player's knowledge and skills. These can range from classical ciphers such as Caesar and Vigenère to modern encryption algorithms like RSA and AES. The challenges may also involve breaking and cracking cryptographic protocols, finding vulnerabilities in cryptographic systems, and more. These CTFs provide a hands-on learning experience, helping participants to understand how cryptography works and how it can be used to secure communication and data.

Severity

A failure of cryptographic assets can be classified high especially if it is in context of highly sensitive data

Cryptography challenges